Add DeepSeek support (#23551)

- Added support for DeepSeek as a new language model provider in Zed
Assistant
- Implemented streaming API support for real-time responses from
DeepSeek models.
- Added a configuration UI for DeepSeek API key management and settings.
- Updated documentation with detailed setup instructions for DeepSeek
integration.
- Added DeepSeek-specific icons and model definitions for seamless
integration into the Zed UI.
- Integrated DeepSeek into the language model registry, making it
available alongside other providers like OpenAI and Anthropic.

Release Notes:

- Added support for DeepSeek to the Assistant.

---------

Co-authored-by: Marshall Bowers <git@maxdeviant.com>

crates/assistant_settings/Cargo.toml

@@ -21,6 +21,7 @@ lmstudio = { workspace = true, features = ["schemars"] }
 log.workspace = true
 ollama = { workspace = true, features = ["schemars"] }
 open_ai = { workspace = true, features = ["schemars"] }
+deepseek = { workspace = true, features = ["schemars"] }
 schemars.workspace = true
 serde.workspace = true
 settings.workspace = true

crates/assistant_settings/src/assistant_settings.rs

@@ -2,6 +2,7 @@ use std::sync::Arc;
 
 use ::open_ai::Model as OpenAiModel;
 use anthropic::Model as AnthropicModel;
+use deepseek::Model as DeepseekModel;
 use feature_flags::FeatureFlagAppExt;
 use gpui::{App, Pixels};
 use language_model::{CloudModel, LanguageModel};
@@ -46,6 +47,11 @@ pub enum AssistantProviderContentV1 {
         default_model: Option<LmStudioModel>,
         api_url: Option<String>,
     },
+    #[serde(rename = "deepseek")]
+    DeepSeek {
+        default_model: Option<DeepseekModel>,
+        api_url: Option<String>,
+    },
 }
 
 #[derive(Debug, Default)]
@@ -149,6 +155,12 @@ impl AssistantSettingsContent {
                                     model: model.id().to_string(),
                                 })
                             }
+                            AssistantProviderContentV1::DeepSeek { default_model, .. } => {
+                                default_model.map(|model| LanguageModelSelection {
+                                    provider: "deepseek".to_string(),
+                                    model: model.id().to_string(),
+                                })
+                            }
                         }),
                     inline_alternatives: None,
                     enable_experimental_live_diffs: None,
@@ -253,6 +265,18 @@ impl AssistantSettingsContent {
                             available_models,
                         });
                     }
+                    "deepseek" => {
+                        let api_url = match &settings.provider {
+                            Some(AssistantProviderContentV1::DeepSeek { api_url, .. }) => {
+                                api_url.clone()
+                            }
+                            _ => None,
+                        };
+                        settings.provider = Some(AssistantProviderContentV1::DeepSeek {
+                            default_model: DeepseekModel::from_id(&model).ok(),
+                            api_url,
+                        });
+                    }
                     _ => {}
                 },
                 VersionedAssistantSettingsContent::V2(settings) => {
@@ -341,6 +365,7 @@ fn providers_schema(_: &mut schemars::gen::SchemaGenerator) -> schemars::schema:
             "openai".into(),
             "zed.dev".into(),
             "copilot_chat".into(),
+            "deepseek".into(),
         ]),
         ..Default::default()
     }
@@ -380,7 +405,7 @@ pub struct AssistantSettingsContentV1 {
     default_height: Option<f32>,
     /// The provider of the assistant service.
     ///
-    /// This can be "openai", "anthropic", "ollama", "lmstudio", "zed.dev"
+    /// This can be "openai", "anthropic", "ollama", "lmstudio", "deepseek", "zed.dev"
     /// each with their respective default models and configurations.
     provider: Option<AssistantProviderContentV1>,
 }

crates/deepseek/Cargo.toml

@@ -0,0 +1,24 @@
+[package]
+name = "deepseek"
+version = "0.1.0"
+edition.workspace = true
+publish.workspace = true
+license = "GPL-3.0-or-later"
+
+[lints]
+workspace = true
+
+[lib]
+path = "src/deepseek.rs"
+
+[features]
+default = []
+schemars = ["dep:schemars"]
+
+[dependencies]
+anyhow.workspace = true
+futures.workspace = true
+http_client.workspace = true
+schemars = { workspace = true, optional = true }
+serde.workspace = true
+serde_json.workspace = true

crates/deepseek/LICENSE-GPL

@@ -0,0 +1 @@
+../../LICENSE-GPL

crates/deepseek/src/deepseek.rs

@@ -0,0 +1,301 @@
+use anyhow::{anyhow, Result};
+use futures::{
+    io::BufReader,
+    stream::{BoxStream, StreamExt},
+    AsyncBufReadExt, AsyncReadExt,
+};
+use http_client::{AsyncBody, HttpClient, Method, Request as HttpRequest};
+use serde::{Deserialize, Serialize};
+use serde_json::Value;
+use std::convert::TryFrom;
+
+pub const DEEPSEEK_API_URL: &str = "https://api.deepseek.com";
+
+#[derive(Clone, Copy, Serialize, Deserialize, Debug, Eq, PartialEq)]
+#[serde(rename_all = "lowercase")]
+pub enum Role {
+    User,
+    Assistant,
+    System,
+    Tool,
+}
+
+impl TryFrom<String> for Role {
+    type Error = anyhow::Error;
+
+    fn try_from(value: String) -> Result<Self> {
+        match value.as_str() {
+            "user" => Ok(Self::User),
+            "assistant" => Ok(Self::Assistant),
+            "system" => Ok(Self::System),
+            "tool" => Ok(Self::Tool),
+            _ => Err(anyhow!("invalid role '{value}'")),
+        }
+    }
+}
+
+impl From<Role> for String {
+    fn from(val: Role) -> Self {
+        match val {
+            Role::User => "user".to_owned(),
+            Role::Assistant => "assistant".to_owned(),
+            Role::System => "system".to_owned(),
+            Role::Tool => "tool".to_owned(),
+        }
+    }
+}
+
+#[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
+#[derive(Clone, Debug, Default, Serialize, Deserialize, PartialEq)]
+pub enum Model {
+    #[serde(rename = "deepseek-chat")]
+    #[default]
+    Chat,
+    #[serde(rename = "deepseek-reasoner")]
+    Reasoner,
+    #[serde(rename = "custom")]
+    Custom {
+        name: String,
+        /// The name displayed in the UI, such as in the assistant panel model dropdown menu.
+        display_name: Option<String>,
+        max_tokens: usize,
+        max_output_tokens: Option<u32>,
+    },
+}
+
+impl Model {
+    pub fn from_id(id: &str) -> Result<Self> {
+        match id {
+            "deepseek-chat" => Ok(Self::Chat),
+            "deepseek-reasoner" => Ok(Self::Reasoner),
+            _ => Err(anyhow!("invalid model id")),
+        }
+    }
+
+    pub fn id(&self) -> &str {
+        match self {
+            Self::Chat => "deepseek-chat",
+            Self::Reasoner => "deepseek-reasoner",
+            Self::Custom { name, .. } => name,
+        }
+    }
+
+    pub fn display_name(&self) -> &str {
+        match self {
+            Self::Chat => "DeepSeek Chat",
+            Self::Reasoner => "DeepSeek Reasoner",
+            Self::Custom {
+                name, display_name, ..
+            } => display_name.as_ref().unwrap_or(name).as_str(),
+        }
+    }
+
+    pub fn max_token_count(&self) -> usize {
+        match self {
+            Self::Chat | Self::Reasoner => 64_000,
+            Self::Custom { max_tokens, .. } => *max_tokens,
+        }
+    }
+
+    pub fn max_output_tokens(&self) -> Option<u32> {
+        match self {
+            Self::Chat => Some(8_192),
+            Self::Reasoner => Some(8_192),
+            Self::Custom {
+                max_output_tokens, ..
+            } => *max_output_tokens,
+        }
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Request {
+    pub model: String,
+    pub messages: Vec<RequestMessage>,
+    pub stream: bool,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub max_tokens: Option<u32>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub temperature: Option<f32>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub response_format: Option<ResponseFormat>,
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    pub tools: Vec<ToolDefinition>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum ResponseFormat {
+    Text,
+    #[serde(rename = "json_object")]
+    JsonObject,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+#[serde(tag = "type", rename_all = "snake_case")]
+pub enum ToolDefinition {
+    Function { function: FunctionDefinition },
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct FunctionDefinition {
+    pub name: String,
+    pub description: Option<String>,
+    pub parameters: Option<Value>,
+}
+
+#[derive(Serialize, Deserialize, Debug, Eq, PartialEq)]
+#[serde(tag = "role", rename_all = "lowercase")]
+pub enum RequestMessage {
+    Assistant {
+        content: Option<String>,
+        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        tool_calls: Vec<ToolCall>,
+    },
+    User {
+        content: String,
+    },
+    System {
+        content: String,
+    },
+    Tool {
+        content: String,
+        tool_call_id: String,
+    },
+}
+
+#[derive(Serialize, Deserialize, Debug, Eq, PartialEq)]
+pub struct ToolCall {
+    pub id: String,
+    #[serde(flatten)]
+    pub content: ToolCallContent,
+}
+
+#[derive(Serialize, Deserialize, Debug, Eq, PartialEq)]
+#[serde(tag = "type", rename_all = "lowercase")]
+pub enum ToolCallContent {
+    Function { function: FunctionContent },
+}
+
+#[derive(Serialize, Deserialize, Debug, Eq, PartialEq)]
+pub struct FunctionContent {
+    pub name: String,
+    pub arguments: String,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct Response {
+    pub id: String,
+    pub object: String,
+    pub created: u64,
+    pub model: String,
+    pub choices: Vec<Choice>,
+    pub usage: Usage,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub reasoning_content: Option<String>,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct Usage {
+    pub prompt_tokens: u32,
+    pub completion_tokens: u32,
+    pub total_tokens: u32,
+    #[serde(default)]
+    pub prompt_cache_hit_tokens: u32,
+    #[serde(default)]
+    pub prompt_cache_miss_tokens: u32,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct Choice {
+    pub index: u32,
+    pub message: RequestMessage,
+    pub finish_reason: Option<String>,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct StreamResponse {
+    pub id: String,
+    pub object: String,
+    pub created: u64,
+    pub model: String,
+    pub choices: Vec<StreamChoice>,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct StreamChoice {
+    pub index: u32,
+    pub delta: StreamDelta,
+    pub finish_reason: Option<String>,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct StreamDelta {
+    pub role: Option<Role>,
+    pub content: Option<String>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub tool_calls: Option<Vec<ToolCallChunk>>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub reasoning_content: Option<String>,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct ToolCallChunk {
+    pub index: usize,
+    pub id: Option<String>,
+    pub function: Option<FunctionChunk>,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct FunctionChunk {
+    pub name: Option<String>,
+    pub arguments: Option<String>,
+}
+
+pub async fn stream_completion(
+    client: &dyn HttpClient,
+    api_url: &str,
+    api_key: &str,
+    request: Request,
+) -> Result<BoxStream<'static, Result<StreamResponse>>> {
+    let uri = format!("{api_url}/v1/chat/completions");
+    let request_builder = HttpRequest::builder()
+        .method(Method::POST)
+        .uri(uri)
+        .header("Content-Type", "application/json")
+        .header("Authorization", format!("Bearer {}", api_key));
+
+    let request = request_builder.body(AsyncBody::from(serde_json::to_string(&request)?))?;
+    let mut response = client.send(request).await?;
+
+    if response.status().is_success() {
+        let reader = BufReader::new(response.into_body());
+        Ok(reader
+            .lines()
+            .filter_map(|line| async move {
+                match line {
+                    Ok(line) => {
+                        let line = line.strip_prefix("data: ")?;
+                        if line == "[DONE]" {
+                            None
+                        } else {
+                            match serde_json::from_str(line) {
+                                Ok(response) => Some(Ok(response)),
+                                Err(error) => Some(Err(anyhow!(error))),
+                            }
+                        }
+                    }
+                    Err(error) => Some(Err(anyhow!(error))),
+                }
+            })
+            .boxed())
+    } else {
+        let mut body = String::new();
+        response.body_mut().read_to_string(&mut body).await?;
+        Err(anyhow!(
+            "Failed to connect to DeepSeek API: {} {}",
+            response.status(),
+            body,
+        ))
+    }
+}

crates/language_model/Cargo.toml

@@ -29,6 +29,7 @@ log.workspace = true
 ollama = { workspace = true, features = ["schemars"] }
 open_ai = { workspace = true, features = ["schemars"] }
 lmstudio = { workspace = true, features = ["schemars"] }
+deepseek = { workspace = true, features = ["schemars"] }
 parking_lot.workspace = true
 proto.workspace = true
 schemars.workspace = true

crates/language_model/src/request.rs

@@ -410,6 +410,84 @@ impl LanguageModelRequest {
             top_p: None,
         }
     }
+
+    pub fn into_deepseek(self, model: String, max_output_tokens: Option<u32>) -> deepseek::Request {
+        let is_reasoner = model == "deepseek-reasoner";
+
+        let len = self.messages.len();
+        let merged_messages =
+            self.messages
+                .into_iter()
+                .fold(Vec::with_capacity(len), |mut acc, msg| {
+                    let role = msg.role;
+                    let content = msg.string_contents();
+
+                    if is_reasoner {
+                        if let Some(last_msg) = acc.last_mut() {
+                            match (last_msg, role) {
+                                (deepseek::RequestMessage::User { content: last }, Role::User) => {
+                                    last.push(' ');
+                                    last.push_str(&content);
+                                    return acc;
+                                }
+
+                                (
+                                    deepseek::RequestMessage::Assistant {
+                                        content: last_content,
+                                        ..
+                                    },
+                                    Role::Assistant,
+                                ) => {
+                                    *last_content = last_content
+                                        .take()
+                                        .map(|c| {
+                                            let mut s =
+                                                String::with_capacity(c.len() + content.len() + 1);
+                                            s.push_str(&c);
+                                            s.push(' ');
+                                            s.push_str(&content);
+                                            s
+                                        })
+                                        .or(Some(content));
+
+                                    return acc;
+                                }
+                                _ => {}
+                            }
+                        }
+                    }
+
+                    acc.push(match role {
+                        Role::User => deepseek::RequestMessage::User { content },
+                        Role::Assistant => deepseek::RequestMessage::Assistant {
+                            content: Some(content),
+                            tool_calls: Vec::new(),
+                        },
+                        Role::System => deepseek::RequestMessage::System { content },
+                    });
+                    acc
+                });
+
+        deepseek::Request {
+            model,
+            messages: merged_messages,
+            stream: true,
+            max_tokens: max_output_tokens,
+            temperature: if is_reasoner { None } else { self.temperature },
+            response_format: None,
+            tools: self
+                .tools
+                .into_iter()
+                .map(|tool| deepseek::ToolDefinition::Function {
+                    function: deepseek::FunctionDefinition {
+                        name: tool.name,
+                        description: Some(tool.description),
+                        parameters: Some(tool.input_schema),
+                    },
+                })
+                .collect(),
+        }
+    }
 }
 
 #[derive(Serialize, Deserialize, Debug, Eq, PartialEq)]

crates/language_model/src/role.rs

@@ -66,6 +66,16 @@ impl From<Role> for open_ai::Role {
     }
 }
 
+impl From<Role> for deepseek::Role {
+    fn from(val: Role) -> Self {
+        match val {
+            Role::User => deepseek::Role::User,
+            Role::Assistant => deepseek::Role::Assistant,
+            Role::System => deepseek::Role::System,
+        }
+    }
+}
+
 impl From<Role> for lmstudio::Role {
     fn from(val: Role) -> Self {
         match val {

crates/language_models/Cargo.toml

@@ -29,6 +29,7 @@ menu.workspace = true
 ollama = { workspace = true, features = ["schemars"] }
 lmstudio = { workspace = true, features = ["schemars"] }
 open_ai = { workspace = true, features = ["schemars"] }
+deepseek = { workspace = true, features = ["schemars"] }
 project.workspace = true
 proto.workspace = true
 schemars.workspace = true

crates/language_models/src/language_models.rs

@@ -4,6 +4,7 @@ use client::{Client, UserStore};
 use fs::Fs;
 use gpui::{App, Context, Entity};
 use language_model::{LanguageModelProviderId, LanguageModelRegistry, ZED_CLOUD_PROVIDER_ID};
+use provider::deepseek::DeepSeekLanguageModelProvider;
 
 mod logging;
 pub mod provider;
@@ -55,6 +56,10 @@ fn register_language_model_providers(
         LmStudioLanguageModelProvider::new(client.http_client(), cx),
         cx,
     );
+    registry.register_provider(
+        DeepSeekLanguageModelProvider::new(client.http_client(), cx),
+        cx,
+    );
     registry.register_provider(
         GoogleLanguageModelProvider::new(client.http_client(), cx),
         cx,

crates/language_models/src/provider.rs

@@ -1,6 +1,7 @@
 pub mod anthropic;
 pub mod cloud;
 pub mod copilot_chat;
+pub mod deepseek;
 pub mod google;
 pub mod lmstudio;
 pub mod ollama;

crates/language_models/src/provider/deepseek.rs

@@ -0,0 +1,559 @@
+use anyhow::{anyhow, Result};
+use collections::BTreeMap;
+use editor::{Editor, EditorElement, EditorStyle};
+use futures::{future::BoxFuture, stream::BoxStream, FutureExt, StreamExt};
+use gpui::{
+    AnyView, AppContext, AsyncApp, Entity, FontStyle, Subscription, Task, TextStyle, WhiteSpace,
+};
+use http_client::HttpClient;
+use language_model::{
+    LanguageModel, LanguageModelCompletionEvent, LanguageModelId, LanguageModelName,
+    LanguageModelProvider, LanguageModelProviderId, LanguageModelProviderName,
+    LanguageModelProviderState, LanguageModelRequest, RateLimiter, Role,
+};
+use schemars::JsonSchema;
+use serde::{Deserialize, Serialize};
+use settings::{Settings, SettingsStore};
+use std::sync::Arc;
+use theme::ThemeSettings;
+use ui::{prelude::*, Icon, IconName};
+use util::ResultExt;
+
+use crate::AllLanguageModelSettings;
+
+const PROVIDER_ID: &str = "deepseek";
+const PROVIDER_NAME: &str = "DeepSeek";
+const DEEPSEEK_API_KEY_VAR: &str = "DEEPSEEK_API_KEY";
+
+#[derive(Default, Clone, Debug, PartialEq)]
+pub struct DeepSeekSettings {
+    pub api_url: String,
+    pub available_models: Vec<AvailableModel>,
+}
+
+#[derive(Clone, Debug, PartialEq, Serialize, Deserialize, JsonSchema)]
+pub struct AvailableModel {
+    pub name: String,
+    pub display_name: Option<String>,
+    pub max_tokens: usize,
+    pub max_output_tokens: Option<u32>,
+}
+
+pub struct DeepSeekLanguageModelProvider {
+    http_client: Arc<dyn HttpClient>,
+    state: Entity<State>,
+}
+
+pub struct State {
+    api_key: Option<String>,
+    api_key_from_env: bool,
+    _subscription: Subscription,
+}
+
+impl State {
+    fn is_authenticated(&self) -> bool {
+        self.api_key.is_some()
+    }
+
+    fn reset_api_key(&self, cx: &mut Context<Self>) -> Task<Result<()>> {
+        let settings = &AllLanguageModelSettings::get_global(cx).deepseek;
+        let delete_credentials = cx.delete_credentials(&settings.api_url);
+        cx.spawn(|this, mut cx| async move {
+            delete_credentials.await.log_err();
+            this.update(&mut cx, |this, cx| {
+                this.api_key = None;
+                this.api_key_from_env = false;
+                cx.notify();
+            })
+        })
+    }
+
+    fn set_api_key(&mut self, api_key: String, cx: &mut Context<Self>) -> Task<Result<()>> {
+        let settings = &AllLanguageModelSettings::get_global(cx).deepseek;
+        let write_credentials =
+            cx.write_credentials(&settings.api_url, "Bearer", api_key.as_bytes());
+
+        cx.spawn(|this, mut cx| async move {
+            write_credentials.await?;
+            this.update(&mut cx, |this, cx| {
+                this.api_key = Some(api_key);
+                cx.notify();
+            })
+        })
+    }
+
+    fn authenticate(&self, cx: &mut Context<Self>) -> Task<Result<()>> {
+        if self.is_authenticated() {
+            Task::ready(Ok(()))
+        } else {
+            let api_url = AllLanguageModelSettings::get_global(cx)
+                .deepseek
+                .api_url
+                .clone();
+
+            cx.spawn(|this, mut cx| async move {
+                let (api_key, from_env) = if let Ok(api_key) = std::env::var(DEEPSEEK_API_KEY_VAR) {
+                    (api_key, true)
+                } else {
+                    let (_, api_key) = cx
+                        .update(|cx| cx.read_credentials(&api_url))?
+                        .await?
+                        .ok_or_else(|| anyhow!("credentials not found"))?;
+                    (String::from_utf8(api_key)?, false)
+                };
+
+                this.update(&mut cx, |this, cx| {
+                    this.api_key = Some(api_key);
+                    this.api_key_from_env = from_env;
+                    cx.notify();
+                })
+            })
+        }
+    }
+}
+
+impl DeepSeekLanguageModelProvider {
+    pub fn new(http_client: Arc<dyn HttpClient>, cx: &mut App) -> Self {
+        let state = cx.new(|cx| State {
+            api_key: None,
+            api_key_from_env: false,
+            _subscription: cx.observe_global::<SettingsStore>(|_this: &mut State, cx| {
+                cx.notify();
+            }),
+        });
+
+        Self { http_client, state }
+    }
+}
+
+impl LanguageModelProviderState for DeepSeekLanguageModelProvider {
+    type ObservableEntity = State;
+
+    fn observable_entity(&self) -> Option<Entity<Self::ObservableEntity>> {
+        Some(self.state.clone())
+    }
+}
+
+impl LanguageModelProvider for DeepSeekLanguageModelProvider {
+    fn id(&self) -> LanguageModelProviderId {
+        LanguageModelProviderId(PROVIDER_ID.into())
+    }
+
+    fn name(&self) -> LanguageModelProviderName {
+        LanguageModelProviderName(PROVIDER_NAME.into())
+    }
+
+    fn icon(&self) -> IconName {
+        IconName::AiDeepSeek
+    }
+
+    fn provided_models(&self, cx: &App) -> Vec<Arc<dyn LanguageModel>> {
+        let mut models = BTreeMap::default();
+
+        models.insert("deepseek-chat", deepseek::Model::Chat);
+        models.insert("deepseek-reasoner", deepseek::Model::Reasoner);
+
+        for available_model in AllLanguageModelSettings::get_global(cx)
+            .deepseek
+            .available_models
+            .iter()
+        {
+            models.insert(
+                &available_model.name,
+                deepseek::Model::Custom {
+                    name: available_model.name.clone(),
+                    display_name: available_model.display_name.clone(),
+                    max_tokens: available_model.max_tokens,
+                    max_output_tokens: available_model.max_output_tokens,
+                },
+            );
+        }
+
+        models
+            .into_values()
+            .map(|model| {
+                Arc::new(DeepSeekLanguageModel {
+                    id: LanguageModelId::from(model.id().to_string()),
+                    model,
+                    state: self.state.clone(),
+                    http_client: self.http_client.clone(),
+                    request_limiter: RateLimiter::new(4),
+                }) as Arc<dyn LanguageModel>
+            })
+            .collect()
+    }
+
+    fn is_authenticated(&self, cx: &App) -> bool {
+        self.state.read(cx).is_authenticated()
+    }
+
+    fn authenticate(&self, cx: &mut App) -> Task<Result<()>> {
+        self.state.update(cx, |state, cx| state.authenticate(cx))
+    }
+
+    fn configuration_view(&self, window: &mut Window, cx: &mut App) -> AnyView {
+        cx.new(|cx| ConfigurationView::new(self.state.clone(), window, cx))
+            .into()
+    }
+
+    fn reset_credentials(&self, cx: &mut App) -> Task<Result<()>> {
+        self.state.update(cx, |state, cx| state.reset_api_key(cx))
+    }
+}
+
+pub struct DeepSeekLanguageModel {
+    id: LanguageModelId,
+    model: deepseek::Model,
+    state: Entity<State>,
+    http_client: Arc<dyn HttpClient>,
+    request_limiter: RateLimiter,
+}
+
+impl DeepSeekLanguageModel {
+    fn stream_completion(
+        &self,
+        request: deepseek::Request,
+        cx: &AsyncApp,
+    ) -> BoxFuture<'static, Result<BoxStream<'static, Result<deepseek::StreamResponse>>>> {
+        let http_client = self.http_client.clone();
+        let Ok((api_key, api_url)) = cx.read_entity(&self.state, |state, cx| {
+            let settings = &AllLanguageModelSettings::get_global(cx).deepseek;
+            (state.api_key.clone(), settings.api_url.clone())
+        }) else {
+            return futures::future::ready(Err(anyhow!("App state dropped"))).boxed();
+        };
+
+        let future = self.request_limiter.stream(async move {
+            let api_key = api_key.ok_or_else(|| anyhow!("Missing DeepSeek API Key"))?;
+            let request =
+                deepseek::stream_completion(http_client.as_ref(), &api_url, &api_key, request);
+            let response = request.await?;
+            Ok(response)
+        });
+
+        async move { Ok(future.await?.boxed()) }.boxed()
+    }
+}
+
+impl LanguageModel for DeepSeekLanguageModel {
+    fn id(&self) -> LanguageModelId {
+        self.id.clone()
+    }
+
+    fn name(&self) -> LanguageModelName {
+        LanguageModelName::from(self.model.display_name().to_string())
+    }
+
+    fn provider_id(&self) -> LanguageModelProviderId {
+        LanguageModelProviderId(PROVIDER_ID.into())
+    }
+
+    fn provider_name(&self) -> LanguageModelProviderName {
+        LanguageModelProviderName(PROVIDER_NAME.into())
+    }
+
+    fn telemetry_id(&self) -> String {
+        format!("deepseek/{}", self.model.id())
+    }
+
+    fn max_token_count(&self) -> usize {
+        self.model.max_token_count()
+    }
+
+    fn max_output_tokens(&self) -> Option<u32> {
+        self.model.max_output_tokens()
+    }
+
+    fn count_tokens(
+        &self,
+        request: LanguageModelRequest,
+        cx: &App,
+    ) -> BoxFuture<'static, Result<usize>> {
+        cx.background_executor()
+            .spawn(async move {
+                let messages = request
+                    .messages
+                    .into_iter()
+                    .map(|message| tiktoken_rs::ChatCompletionRequestMessage {
+                        role: match message.role {
+                            Role::User => "user".into(),
+                            Role::Assistant => "assistant".into(),
+                            Role::System => "system".into(),
+                        },
+                        content: Some(message.string_contents()),
+                        name: None,
+                        function_call: None,
+                    })
+                    .collect::<Vec<_>>();
+
+                tiktoken_rs::num_tokens_from_messages("gpt-4", &messages)
+            })
+            .boxed()
+    }
+
+    fn stream_completion(
+        &self,
+        request: LanguageModelRequest,
+        cx: &AsyncApp,
+    ) -> BoxFuture<'static, Result<BoxStream<'static, Result<LanguageModelCompletionEvent>>>> {
+        let request = request.into_deepseek(self.model.id().to_string(), self.max_output_tokens());
+        let stream = self.stream_completion(request, cx);
+
+        async move {
+            let stream = stream.await?;
+            Ok(stream
+                .map(|result| {
+                    result.and_then(|response| {
+                        response
+                            .choices
+                            .first()
+                            .ok_or_else(|| anyhow!("Empty response"))
+                            .map(|choice| {
+                                choice
+                                    .delta
+                                    .content
+                                    .clone()
+                                    .unwrap_or_default()
+                                    .map(LanguageModelCompletionEvent::Text)
+                            })
+                    })
+                })
+                .boxed())
+        }
+        .boxed()
+    }
+    fn use_any_tool(
+        &self,
+        request: LanguageModelRequest,
+        name: String,
+        description: String,
+        schema: serde_json::Value,
+        cx: &AsyncApp,
+    ) -> BoxFuture<'static, Result<futures::stream::BoxStream<'static, Result<String>>>> {
+        let mut deepseek_request =
+            request.into_deepseek(self.model.id().to_string(), self.max_output_tokens());
+
+        deepseek_request.tools = vec![deepseek::ToolDefinition::Function {
+            function: deepseek::FunctionDefinition {
+                name: name.clone(),
+                description: Some(description),
+                parameters: Some(schema),
+            },
+        }];
+
+        let response_stream = self.stream_completion(deepseek_request, cx);
+
+        self.request_limiter
+            .run(async move {
+                let stream = response_stream.await?;
+
+                let tool_args_stream = stream
+                    .filter_map(move |response| async move {
+                        match response {
+                            Ok(response) => {
+                                for choice in response.choices {
+                                    if let Some(tool_calls) = choice.delta.tool_calls {
+                                        for tool_call in tool_calls {
+                                            if let Some(function) = tool_call.function {
+                                                if let Some(args) = function.arguments {
+                                                    return Some(Ok(args));
+                                                }
+                                            }
+                                        }
+                                    }
+                                }
+                                None
+                            }
+                            Err(e) => Some(Err(e)),
+                        }
+                    })
+                    .boxed();
+
+                Ok(tool_args_stream)
+            })
+            .boxed()
+    }
+}
+
+struct ConfigurationView {
+    api_key_editor: Entity<Editor>,
+    state: Entity<State>,
+    load_credentials_task: Option<Task<()>>,
+}
+
+impl ConfigurationView {
+    fn new(state: Entity<State>, window: &mut Window, cx: &mut Context<Self>) -> Self {
+        let api_key_editor = cx.new(|cx| {
+            let mut editor = Editor::single_line(window, cx);
+            editor.set_placeholder_text("sk-00000000000000000000000000000000", cx);
+            editor
+        });
+
+        cx.observe(&state, |_, _, cx| {
+            cx.notify();
+        })
+        .detach();
+
+        let load_credentials_task = Some(cx.spawn({
+            let state = state.clone();
+            |this, mut cx| async move {
+                if let Some(task) = state
+                    .update(&mut cx, |state, cx| state.authenticate(cx))
+                    .log_err()
+                {
+                    let _ = task.await;
+                }
+
+                this.update(&mut cx, |this, cx| {
+                    this.load_credentials_task = None;
+                    cx.notify();
+                })
+                .log_err();
+            }
+        }));
+
+        Self {
+            api_key_editor,
+            state,
+            load_credentials_task,
+        }
+    }
+
+    fn save_api_key(&mut self, _: &menu::Confirm, _window: &mut Window, cx: &mut Context<Self>) {
+        let api_key = self.api_key_editor.read(cx).text(cx);
+        if api_key.is_empty() {
+            return;
+        }
+
+        let state = self.state.clone();
+        cx.spawn(|_, mut cx| async move {
+            state
+                .update(&mut cx, |state, cx| state.set_api_key(api_key, cx))?
+                .await
+        })
+        .detach_and_log_err(cx);
+
+        cx.notify();
+    }
+
+    fn reset_api_key(&mut self, window: &mut Window, cx: &mut Context<Self>) {
+        self.api_key_editor
+            .update(cx, |editor, cx| editor.set_text("", window, cx));
+
+        let state = self.state.clone();
+        cx.spawn(|_, mut cx| async move {
+            state
+                .update(&mut cx, |state, cx| state.reset_api_key(cx))?
+                .await
+        })
+        .detach_and_log_err(cx);
+
+        cx.notify();
+    }
+
+    fn render_api_key_editor(&self, cx: &mut Context<Self>) -> impl IntoElement {
+        let settings = ThemeSettings::get_global(cx);
+        let text_style = TextStyle {
+            color: cx.theme().colors().text,
+            font_family: settings.ui_font.family.clone(),
+            font_features: settings.ui_font.features.clone(),
+            font_fallbacks: settings.ui_font.fallbacks.clone(),
+            font_size: rems(0.875).into(),
+            font_weight: settings.ui_font.weight,
+            font_style: FontStyle::Normal,
+            line_height: relative(1.3),
+            background_color: None,
+            underline: None,
+            strikethrough: None,
+            white_space: WhiteSpace::Normal,
+            truncate: None,
+        };
+        EditorElement::new(
+            &self.api_key_editor,
+            EditorStyle {
+                background: cx.theme().colors().editor_background,
+                local_player: cx.theme().players().local(),
+                text: text_style,
+                ..Default::default()
+            },
+        )
+    }
+
+    fn should_render_editor(&self, cx: &mut Context<Self>) -> bool {
+        !self.state.read(cx).is_authenticated()
+    }
+}
+
+impl Render for ConfigurationView {
+    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
+        const DEEPSEEK_CONSOLE_URL: &str = "https://platform.deepseek.com/api_keys";
+        const INSTRUCTIONS: [&str; 3] = [
+            "To use DeepSeek in Zed, you need an API key:",
+            "- Get your API key from:",
+            "- Paste it below and press enter:",
+        ];
+
+        let env_var_set = self.state.read(cx).api_key_from_env;
+
+        if self.load_credentials_task.is_some() {
+            div().child(Label::new("Loading credentials...")).into_any()
+        } else if self.should_render_editor(cx) {
+            v_flex()
+                .size_full()
+                .on_action(cx.listener(Self::save_api_key))
+                .child(Label::new(INSTRUCTIONS[0]))
+                .child(
+                    h_flex().child(Label::new(INSTRUCTIONS[1])).child(
+                        Button::new("deepseek_console", DEEPSEEK_CONSOLE_URL)
+                            .style(ButtonStyle::Subtle)
+                            .icon(IconName::ExternalLink)
+                            .icon_size(IconSize::XSmall)
+                            .icon_color(Color::Muted)
+                            .on_click(move |_, _window, cx| cx.open_url(DEEPSEEK_CONSOLE_URL)),
+                    ),
+                )
+                .child(Label::new(INSTRUCTIONS[2]))
+                .child(
+                    h_flex()
+                        .w_full()
+                        .my_2()
+                        .px_2()
+                        .py_1()
+                        .bg(cx.theme().colors().editor_background)
+                        .rounded_md()
+                        .child(self.render_api_key_editor(cx)),
+                )
+                .child(
+                    Label::new(format!(
+                        "Or set {} environment variable",
+                        DEEPSEEK_API_KEY_VAR
+                    ))
+                    .size(LabelSize::Small),
+                )
+                .into_any()
+        } else {
+            h_flex()
+                .size_full()
+                .justify_between()
+                .child(
+                    h_flex()
+                        .gap_1()
+                        .child(Icon::new(IconName::Check).color(Color::Success))
+                        .child(Label::new(if env_var_set {
+                            format!("API key set in {}", DEEPSEEK_API_KEY_VAR)
+                        } else {
+                            "API key configured".to_string()
+                        })),
+                )
+                .child(
+                    Button::new("reset-key", "Reset")
+                        .icon(IconName::Trash)
+                        .disabled(env_var_set)
+                        .on_click(
+                            cx.listener(|this, _, window, cx| this.reset_api_key(window, cx)),
+                        ),
+                )
+                .into_any()
+        }
+    }
+}

crates/language_models/src/settings.rs

@@ -13,6 +13,7 @@ use crate::provider::{
     anthropic::AnthropicSettings,
     cloud::{self, ZedDotDevSettings},
     copilot_chat::CopilotChatSettings,
+    deepseek::DeepSeekSettings,
     google::GoogleSettings,
     lmstudio::LmStudioSettings,
     ollama::OllamaSettings,
@@ -61,6 +62,7 @@ pub struct AllLanguageModelSettings {
     pub google: GoogleSettings,
     pub copilot_chat: CopilotChatSettings,
     pub lmstudio: LmStudioSettings,
+    pub deepseek: DeepSeekSettings,
 }
 
 #[derive(Default, Clone, Debug, Serialize, Deserialize, PartialEq, JsonSchema)]
@@ -72,6 +74,7 @@ pub struct AllLanguageModelSettingsContent {
     #[serde(rename = "zed.dev")]
     pub zed_dot_dev: Option<ZedDotDevSettingsContent>,
     pub google: Option<GoogleSettingsContent>,
+    pub deepseek: Option<DeepseekSettingsContent>,
     pub copilot_chat: Option<CopilotChatSettingsContent>,
 }
 
@@ -162,6 +165,12 @@ pub struct LmStudioSettingsContent {
     pub available_models: Option<Vec<provider::lmstudio::AvailableModel>>,
 }
 
+#[derive(Default, Clone, Debug, Serialize, Deserialize, PartialEq, JsonSchema)]
+pub struct DeepseekSettingsContent {
+    pub api_url: Option<String>,
+    pub available_models: Option<Vec<provider::deepseek::AvailableModel>>,
+}
+
 #[derive(Clone, Debug, Serialize, Deserialize, PartialEq, JsonSchema)]
 #[serde(untagged)]
 pub enum OpenAiSettingsContent {
@@ -299,6 +308,18 @@ impl settings::Settings for AllLanguageModelSettings {
                 lmstudio.as_ref().and_then(|s| s.available_models.clone()),
             );
 
+            // DeepSeek
+            let deepseek = value.deepseek.clone();
+
+            merge(
+                &mut settings.deepseek.api_url,
+                value.deepseek.as_ref().and_then(|s| s.api_url.clone()),
+            );
+            merge(
+                &mut settings.deepseek.available_models,
+                deepseek.as_ref().and_then(|s| s.available_models.clone()),
+            );
+
             // OpenAI
             let (openai, upgraded) = match value.openai.clone().map(|s| s.upgrade()) {
                 Some((content, upgraded)) => (Some(content), upgraded),

crates/ui/src/components/icon.rs

@@ -128,6 +128,7 @@ pub enum IconName {
     Ai,
     AiAnthropic,
     AiAnthropicHosted,
+    AiDeepSeek,
     AiGoogle,
     AiLmStudio,
     AiOllama,