assistant: Add Mistral support (#24879)

Closes #12519.

Release Notes:

- Added support for Mistral to the Assistant.

---------

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

Cargo.lock

@@ -6965,6 +6965,7 @@ dependencies = [
  "image",
  "lmstudio",
  "log",
+ "mistral",
  "ollama",
  "open_ai",
  "parking_lot",
@@ -7012,6 +7013,7 @@ dependencies = [
  "language_model",
  "lmstudio",
  "menu",
+ "mistral",
  "ollama",
  "open_ai",
  "project",
@@ -7973,6 +7975,19 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "mistral"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "futures 0.3.31",
+ "http_client",
+ "schemars",
+ "serde",
+ "serde_json",
+ "strum",
+]
+
 [[package]]
 name = "msvc_spectre_libs"
 version = "0.1.2"

Cargo.toml

@@ -84,6 +84,7 @@ members = [
     "crates/media",
     "crates/menu",
     "crates/migrator",
+    "crates/mistral",
     "crates/multi_buffer",
     "crates/node_runtime",
     "crates/notifications",
@@ -283,6 +284,7 @@ markdown_preview = { path = "crates/markdown_preview" }
 media = { path = "crates/media" }
 menu = { path = "crates/menu" }
 migrator = { path = "crates/migrator" }
+mistral = { path = "crates/mistral" }
 multi_buffer = { path = "crates/multi_buffer" }
 node_runtime = { path = "crates/node_runtime" }
 notifications = { path = "crates/notifications" }

assets/icons/ai_mistral.svg

@@ -0,0 +1 @@
+<svg fill="currentColor" fill-rule="evenodd" height="1em" style="flex:none;line-height:1" viewBox="0 0 24 24" width="1em" xmlns="http://www.w3.org/2000/svg"><title>Mistral</title><g><path d="M15 6v4h-2V6h2zm4-4v4h-2V2h2zM3 2H1h2zM1 2h2v20H1V2zm8 12h2v4H9v-4zm8 0h2v8h-2v-8z"></path><path d="M19 2h4v4h-4V2zM3 2h4v4H3V2z" opacity=".4"></path><path d="M15 10V6h8v4h-8zM3 10V6h8v4H3z" opacity=".5"></path><path d="M3 14v-4h20v4z" opacity=".6"></path><path d="M11 14h4v4h-4v-4zm8 0h4v4h-4v-4zM3 14h4v4H3v-4z" opacity=".7"></path><path d="M19 18h4v4h-4v-4zM3 18h4v4H3v-4z" opacity=".8"></path></g></svg>

assets/settings/default.json

@@ -1193,6 +1193,9 @@
     },
     "deepseek": {
       "api_url": "https://api.deepseek.com"
+    },
+    "mistral": {
+      "api_url": "https://api.mistral.ai/v1"
     }
   },
   // Zed's Prettier integration settings.

crates/language_model/Cargo.toml

@@ -28,6 +28,7 @@ http_client.workspace = true
 image.workspace = true
 lmstudio = { workspace = true, features = ["schemars"] }
 log.workspace = true
+mistral = { workspace = true, features = ["schemars"] }
 ollama = { workspace = true, features = ["schemars"] }
 open_ai = { workspace = true, features = ["schemars"] }
 parking_lot.workspace = true

crates/language_model/src/request.rs

@@ -269,6 +269,47 @@ impl LanguageModelRequest {
         }
     }
 
+    pub fn into_mistral(self, model: String, max_output_tokens: Option<u32>) -> mistral::Request {
+        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();
+
+                    acc.push(match role {
+                        Role::User => mistral::RequestMessage::User { content },
+                        Role::Assistant => mistral::RequestMessage::Assistant {
+                            content: Some(content),
+                            tool_calls: Vec::new(),
+                        },
+                        Role::System => mistral::RequestMessage::System { content },
+                    });
+                    acc
+                });
+
+        mistral::Request {
+            model,
+            messages: merged_messages,
+            stream: true,
+            max_tokens: max_output_tokens,
+            temperature: self.temperature,
+            response_format: None,
+            tools: self
+                .tools
+                .into_iter()
+                .map(|tool| mistral::ToolDefinition::Function {
+                    function: mistral::FunctionDefinition {
+                        name: tool.name,
+                        description: Some(tool.description),
+                        parameters: Some(tool.input_schema),
+                    },
+                })
+                .collect(),
+        }
+    }
+
     pub fn into_google(self, model: String) -> google_ai::GenerateContentRequest {
         google_ai::GenerateContentRequest {
             model,

crates/language_models/Cargo.toml

@@ -28,6 +28,7 @@ http_client.workspace = true
 language_model.workspace = true
 lmstudio = { workspace = true, features = ["schemars"] }
 menu.workspace = true
+mistral = { workspace = true, features = ["schemars"] }
 ollama = { workspace = true, features = ["schemars"] }
 open_ai = { workspace = true, features = ["schemars"] }
 project.workspace = true

crates/language_models/src/language_models.rs

@@ -17,6 +17,7 @@ pub use crate::provider::cloud::RefreshLlmTokenListener;
 use crate::provider::copilot_chat::CopilotChatLanguageModelProvider;
 use crate::provider::google::GoogleLanguageModelProvider;
 use crate::provider::lmstudio::LmStudioLanguageModelProvider;
+use crate::provider::mistral::MistralLanguageModelProvider;
 use crate::provider::ollama::OllamaLanguageModelProvider;
 use crate::provider::open_ai::OpenAiLanguageModelProvider;
 pub use crate::settings::*;
@@ -64,6 +65,10 @@ fn register_language_model_providers(
         GoogleLanguageModelProvider::new(client.http_client(), cx),
         cx,
     );
+    registry.register_provider(
+        MistralLanguageModelProvider::new(client.http_client(), cx),
+        cx,
+    );
     registry.register_provider(CopilotChatLanguageModelProvider::new(cx), cx);
 
     cx.observe_flag::<feature_flags::LanguageModels, _>(move |enabled, cx| {

crates/language_models/src/provider.rs

@@ -4,5 +4,6 @@ pub mod copilot_chat;
 pub mod deepseek;
 pub mod google;
 pub mod lmstudio;
+pub mod mistral;
 pub mod ollama;
 pub mod open_ai;

crates/language_models/src/provider/mistral.rs

@@ -0,0 +1,573 @@
+use anyhow::{anyhow, Result};
+use collections::BTreeMap;
+use editor::{Editor, EditorElement, EditorStyle};
+use futures::{future::BoxFuture, FutureExt, StreamExt};
+use gpui::{
+    AnyView, App, AsyncApp, Context, 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 futures::stream::BoxStream;
+use schemars::JsonSchema;
+use serde::{Deserialize, Serialize};
+use settings::{Settings, SettingsStore};
+use std::sync::Arc;
+use strum::IntoEnumIterator;
+use theme::ThemeSettings;
+use ui::{prelude::*, Icon, IconName, Tooltip};
+use util::ResultExt;
+
+use crate::AllLanguageModelSettings;
+
+const PROVIDER_ID: &str = "mistral";
+const PROVIDER_NAME: &str = "Mistral";
+
+#[derive(Default, Clone, Debug, PartialEq)]
+pub struct MistralSettings {
+    pub api_url: String,
+    pub available_models: Vec<AvailableModel>,
+    pub needs_setting_migration: bool,
+}
+
+#[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 max_completion_tokens: Option<u32>,
+}
+
+pub struct MistralLanguageModelProvider {
+    http_client: Arc<dyn HttpClient>,
+    state: gpui::Entity<State>,
+}
+
+pub struct State {
+    api_key: Option<String>,
+    api_key_from_env: bool,
+    _subscription: Subscription,
+}
+
+const MISTRAL_API_KEY_VAR: &str = "MISTRAL_API_KEY";
+
+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).mistral;
+        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).mistral;
+        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)
+                .mistral
+                .api_url
+                .clone();
+            cx.spawn(|this, mut cx| async move {
+                let (api_key, from_env) = if let Ok(api_key) = std::env::var(MISTRAL_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 MistralLanguageModelProvider {
+    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 MistralLanguageModelProvider {
+    type ObservableEntity = State;
+
+    fn observable_entity(&self) -> Option<gpui::Entity<Self::ObservableEntity>> {
+        Some(self.state.clone())
+    }
+}
+
+impl LanguageModelProvider for MistralLanguageModelProvider {
+    fn id(&self) -> LanguageModelProviderId {
+        LanguageModelProviderId(PROVIDER_ID.into())
+    }
+
+    fn name(&self) -> LanguageModelProviderName {
+        LanguageModelProviderName(PROVIDER_NAME.into())
+    }
+
+    fn icon(&self) -> IconName {
+        IconName::AiMistral
+    }
+
+    fn provided_models(&self, cx: &App) -> Vec<Arc<dyn LanguageModel>> {
+        let mut models = BTreeMap::default();
+
+        // Add base models from mistral::Model::iter()
+        for model in mistral::Model::iter() {
+            if !matches!(model, mistral::Model::Custom { .. }) {
+                models.insert(model.id().to_string(), model);
+            }
+        }
+
+        // Override with available models from settings
+        for model in &AllLanguageModelSettings::get_global(cx)
+            .mistral
+            .available_models
+        {
+            models.insert(
+                model.name.clone(),
+                mistral::Model::Custom {
+                    name: model.name.clone(),
+                    display_name: model.display_name.clone(),
+                    max_tokens: model.max_tokens,
+                    max_output_tokens: model.max_output_tokens,
+                    max_completion_tokens: model.max_completion_tokens,
+                },
+            );
+        }
+
+        models
+            .into_values()
+            .map(|model| {
+                Arc::new(MistralLanguageModel {
+                    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 MistralLanguageModel {
+    id: LanguageModelId,
+    model: mistral::Model,
+    state: gpui::Entity<State>,
+    http_client: Arc<dyn HttpClient>,
+    request_limiter: RateLimiter,
+}
+
+impl MistralLanguageModel {
+    fn stream_completion(
+        &self,
+        request: mistral::Request,
+        cx: &AsyncApp,
+    ) -> BoxFuture<
+        'static,
+        Result<futures::stream::BoxStream<'static, Result<mistral::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).mistral;
+            (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 Mistral API Key"))?;
+            let request =
+                mistral::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 MistralLanguageModel {
+    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!("mistral/{}", 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_mistral(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,
+        tool_name: String,
+        tool_description: String,
+        schema: serde_json::Value,
+        cx: &AsyncApp,
+    ) -> BoxFuture<'static, Result<futures::stream::BoxStream<'static, Result<String>>>> {
+        let mut request = request.into_mistral(self.model.id().into(), self.max_output_tokens());
+        request.tools = vec![mistral::ToolDefinition::Function {
+            function: mistral::FunctionDefinition {
+                name: tool_name.clone(),
+                description: Some(tool_description),
+                parameters: Some(schema),
+            },
+        }];
+
+        let response = self.stream_completion(request, cx);
+        self.request_limiter
+            .run(async move {
+                let stream = response.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: gpui::Entity<State>,
+    load_credentials_task: Option<Task<()>>,
+}
+
+impl ConfigurationView {
+    fn new(state: gpui::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("0aBCDEFGhIjKLmNOpqrSTUVwxyzabCDE1f2", cx);
+            editor
+        });
+
+        cx.observe(&state, |_, _, cx| {
+            cx.notify();
+        })
+        .detach();
+
+        let load_credentials_task = Some(cx.spawn_in(window, {
+            let state = state.clone();
+            |this, mut cx| async move {
+                if let Some(task) = state
+                    .update(&mut cx, |state, cx| state.authenticate(cx))
+                    .log_err()
+                {
+                    // We don't log an error, because "not signed in" is also an error.
+                    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_in(window, |_, 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_in(window, |_, 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),
+            white_space: WhiteSpace::Normal,
+            ..Default::default()
+        };
+        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, _: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
+        const MISTRAL_CONSOLE_URL: &str = "https://console.mistral.ai/api-keys";
+        const INSTRUCTIONS: [&str; 4] = [
+            "To use Zed's assistant with Mistral, you need to add an API key. Follow these steps:",
+            " - Create one by visiting:",
+            " - Ensure your Mistral account has credits",
+            " - Paste your API key below and hit enter to start using the assistant",
+        ];
+
+        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("mistral_console", MISTRAL_CONSOLE_URL)
+                        .style(ButtonStyle::Subtle)
+                        .icon(IconName::ArrowUpRight)
+                        .icon_size(IconSize::XSmall)
+                        .icon_color(Color::Muted)
+                        .on_click(move |_, _, cx| cx.open_url(MISTRAL_CONSOLE_URL))
+                    )
+                )
+                .children(
+                    (2..INSTRUCTIONS.len()).map(|n|
+                        Label::new(INSTRUCTIONS[n])).collect::<Vec<_>>())
+                .child(
+                    h_flex()
+                        .w_full()
+                        .my_2()
+                        .px_2()
+                        .py_1()
+                        .bg(cx.theme().colors().editor_background)
+                        .border_1()
+                        .border_color(cx.theme().colors().border_variant)
+                        .rounded_md()
+                        .child(self.render_api_key_editor(cx)),
+                )
+                .child(
+                    Label::new(
+                        format!("You can also assign the {MISTRAL_API_KEY_VAR} environment variable and restart Zed."),
+                    )
+                    .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 {MISTRAL_API_KEY_VAR} environment variable.")
+                        } else {
+                            "API key configured.".to_string()
+                        })),
+                )
+                .child(
+                    Button::new("reset-key", "Reset key")
+                        .icon(Some(IconName::Trash))
+                        .icon_size(IconSize::Small)
+                        .icon_position(IconPosition::Start)
+                        .disabled(env_var_set)
+                        .when(env_var_set, |this| {
+                            this.tooltip(Tooltip::text(format!("To reset your API key, unset the {MISTRAL_API_KEY_VAR} environment variable.")))
+                        })
+                        .on_click(cx.listener(|this, _, window, cx| this.reset_api_key(window, cx))),
+                )
+                .into_any()
+        }
+    }
+}

crates/language_models/src/settings.rs

@@ -16,6 +16,7 @@ use crate::provider::{
     deepseek::DeepSeekSettings,
     google::GoogleSettings,
     lmstudio::LmStudioSettings,
+    mistral::MistralSettings,
     ollama::OllamaSettings,
     open_ai::OpenAiSettings,
 };
@@ -63,6 +64,7 @@ pub struct AllLanguageModelSettings {
     pub copilot_chat: CopilotChatSettings,
     pub lmstudio: LmStudioSettings,
     pub deepseek: DeepSeekSettings,
+    pub mistral: MistralSettings,
 }
 
 #[derive(Default, Clone, Debug, Serialize, Deserialize, PartialEq, JsonSchema)]
@@ -76,6 +78,7 @@ pub struct AllLanguageModelSettingsContent {
     pub google: Option<GoogleSettingsContent>,
     pub deepseek: Option<DeepseekSettingsContent>,
     pub copilot_chat: Option<CopilotChatSettingsContent>,
+    pub mistral: Option<MistralSettingsContent>,
 }
 
 #[derive(Clone, Debug, Serialize, Deserialize, PartialEq, JsonSchema)]
@@ -171,6 +174,12 @@ pub struct DeepseekSettingsContent {
     pub available_models: Option<Vec<provider::deepseek::AvailableModel>>,
 }
 
+#[derive(Default, Clone, Debug, Serialize, Deserialize, PartialEq, JsonSchema)]
+pub struct MistralSettingsContent {
+    pub api_url: Option<String>,
+    pub available_models: Option<Vec<provider::mistral::AvailableModel>>,
+}
+
 #[derive(Clone, Debug, Serialize, Deserialize, PartialEq, JsonSchema)]
 #[serde(untagged)]
 pub enum OpenAiSettingsContent {
@@ -356,6 +365,17 @@ impl settings::Settings for AllLanguageModelSettings {
                     .as_ref()
                     .and_then(|s| s.available_models.clone()),
             );
+
+            // Mistral
+            let mistral = value.mistral.clone();
+            merge(
+                &mut settings.mistral.api_url,
+                mistral.as_ref().and_then(|s| s.api_url.clone()),
+            );
+            merge(
+                &mut settings.mistral.available_models,
+                mistral.as_ref().and_then(|s| s.available_models.clone()),
+            );
         }
 
         Ok(settings)

crates/mistral/Cargo.toml

@@ -0,0 +1,25 @@
+[package]
+name = "mistral"
+version = "0.1.0"
+edition.workspace = true
+publish.workspace = true
+license = "GPL-3.0-or-later"
+
+[lints]
+workspace = true
+
+[lib]
+path = "src/mistral.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
+strum.workspace = true

crates/mistral/LICENSE-GPL

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

crates/mistral/src/mistral.rs

@@ -0,0 +1,344 @@
+use anyhow::{anyhow, Result};
+use futures::{io::BufReader, stream::BoxStream, AsyncBufReadExt, AsyncReadExt, StreamExt};
+use http_client::{AsyncBody, HttpClient, Method, Request as HttpRequest};
+use serde::{Deserialize, Serialize};
+use serde_json::Value;
+use std::convert::TryFrom;
+use strum::EnumIter;
+
+pub const MISTRAL_API_URL: &str = "https://api.mistral.ai/v1";
+
+#[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, EnumIter)]
+pub enum Model {
+    #[serde(rename = "codestral-latest", alias = "codestral-latest")]
+    CodestralLatest,
+    #[serde(rename = "mistral-large-latest", alias = "mistral-large-latest")]
+    MistralLargeLatest,
+    #[serde(rename = "mistral-small-latest", alias = "mistral-small-latest")]
+    MistralSmallLatest,
+    #[serde(rename = "open-mistral-nemo", alias = "open-mistral-nemo")]
+    OpenMistralNemo,
+    #[serde(rename = "open-codestral-mamba", alias = "open-codestral-mamba")]
+    #[default]
+    OpenCodestralMamba,
+
+    #[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>,
+        max_completion_tokens: Option<u32>,
+    },
+}
+
+impl Model {
+    pub fn from_id(id: &str) -> Result<Self> {
+        match id {
+            "codestral-latest" => Ok(Self::CodestralLatest),
+            "mistral-large-latest" => Ok(Self::MistralLargeLatest),
+            "mistral-small-latest" => Ok(Self::MistralSmallLatest),
+            "open-mistral-nemo" => Ok(Self::OpenMistralNemo),
+            "open-codestral-mamba" => Ok(Self::OpenCodestralMamba),
+            _ => Err(anyhow!("invalid model id")),
+        }
+    }
+
+    pub fn id(&self) -> &str {
+        match self {
+            Self::CodestralLatest => "codestral-latest",
+            Self::MistralLargeLatest => "mistral-large-latest",
+            Self::MistralSmallLatest => "mistral-small-latest",
+            Self::OpenMistralNemo => "open-mistral-nemo",
+            Self::OpenCodestralMamba => "open-codestral-mamba",
+            Self::Custom { name, .. } => name,
+        }
+    }
+
+    pub fn display_name(&self) -> &str {
+        match self {
+            Self::CodestralLatest => "codestral-latest",
+            Self::MistralLargeLatest => "mistral-large-latest",
+            Self::MistralSmallLatest => "mistral-small-latest",
+            Self::OpenMistralNemo => "open-mistral-nemo",
+            Self::OpenCodestralMamba => "open-codestral-mamba",
+            Self::Custom {
+                name, display_name, ..
+            } => display_name.as_ref().unwrap_or(name),
+        }
+    }
+
+    pub fn max_token_count(&self) -> usize {
+        match self {
+            Self::CodestralLatest => 256000,
+            Self::MistralLargeLatest => 131000,
+            Self::MistralSmallLatest => 32000,
+            Self::OpenMistralNemo => 131000,
+            Self::OpenCodestralMamba => 256000,
+            Self::Custom { max_tokens, .. } => *max_tokens,
+        }
+    }
+
+    pub fn max_output_tokens(&self) -> Option<u32> {
+        match self {
+            Self::Custom {
+                max_output_tokens, ..
+            } => *max_output_tokens,
+            _ => None,
+        }
+    }
+}
+
+#[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(Debug, Serialize, Deserialize)]
+pub struct CompletionRequest {
+    pub model: String,
+    pub prompt: String,
+    pub max_tokens: u32,
+    pub temperature: f32,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub prediction: Option<Prediction>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub rewrite_speculation: Option<bool>,
+}
+
+#[derive(Clone, Deserialize, Serialize, Debug)]
+#[serde(tag = "type", rename_all = "snake_case")]
+pub enum Prediction {
+    Content { content: String },
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum ToolChoice {
+    Auto,
+    Required,
+    None,
+    Other(ToolDefinition),
+}
+
+#[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 CompletionChoice {
+    pub text: 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,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct Usage {
+    pub prompt_tokens: u32,
+    pub completion_tokens: u32,
+    pub total_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, Eq, PartialEq)]
+pub struct ToolCallChunk {
+    pub index: usize,
+    pub id: Option<String>,
+    pub function: Option<FunctionChunk>,
+}
+
+#[derive(Serialize, Deserialize, Debug, Eq, PartialEq)]
+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}/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 Mistral API: {} {}",
+            response.status(),
+            body,
+        ))
+    }
+}

crates/ui/src/components/icon.rs

@@ -131,6 +131,7 @@ pub enum IconName {
     AiDeepSeek,
     AiGoogle,
     AiLmStudio,
+    AiMistral,
     AiOllama,
     AiOpenAi,
     AiZed,