Add support for interacting with Claude in the assistant panel (#11798)

Release Notes:

- Added support for interacting with Claude in the assistant panel. You
can enable it by adding the following to your `settings.json`:

    ```json
    "assistant": {
        "version": "1",
        "provider": {
            "name": "anthropic"
        }
    }
    ```

Cargo.lock

@@ -225,6 +225,8 @@ dependencies = [
  "anyhow",
  "futures 0.3.28",
  "http 0.1.0",
+ "isahc",
+ "schemars",
  "serde",
  "serde_json",
  "tokio",
@@ -332,6 +334,7 @@ dependencies = [
 name = "assistant"
 version = "0.1.0"
 dependencies = [
+ "anthropic",
  "anyhow",
  "chrono",
  "client",

crates/anthropic/Cargo.toml

@@ -5,6 +5,10 @@ edition = "2021"
 publish = false
 license = "AGPL-3.0-or-later"
 
+[features]
+default = []
+schemars = ["dep:schemars"]
+
 [lints]
 workspace = true
 
@@ -15,6 +19,8 @@ path = "src/anthropic.rs"
 anyhow.workspace = true
 futures.workspace = true
 http.workspace = true
+isahc.workspace = true
+schemars = { workspace = true, optional = true }
 serde.workspace = true
 serde_json.workspace = true
 

crates/anthropic/src/anthropic.rs

@@ -1,17 +1,21 @@
 use anyhow::{anyhow, Result};
 use futures::{io::BufReader, stream::BoxStream, AsyncBufReadExt, AsyncReadExt, StreamExt};
 use http::{AsyncBody, HttpClient, Method, Request as HttpRequest};
+use isahc::config::Configurable;
 use serde::{Deserialize, Serialize};
-use std::{convert::TryFrom, sync::Arc};
+use std::{convert::TryFrom, time::Duration};
 
+pub const ANTHROPIC_API_URL: &'static str = "https://api.anthropic.com";
+
+#[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
 #[derive(Clone, Debug, Default, Serialize, Deserialize, PartialEq)]
 pub enum Model {
     #[default]
-    #[serde(rename = "claude-3-opus-20240229")]
+    #[serde(rename = "claude-3-opus", alias = "claude-3-opus-20240229")]
     Claude3Opus,
-    #[serde(rename = "claude-3-sonnet-20240229")]
+    #[serde(rename = "claude-3-sonnet", alias = "claude-3-sonnet-20240229")]
     Claude3Sonnet,
-    #[serde(rename = "claude-3-haiku-20240307")]
+    #[serde(rename = "claude-3-haiku", alias = "claude-3-haiku-20240307")]
     Claude3Haiku,
 }
 
@@ -28,6 +32,14 @@ impl Model {
         }
     }
 
+    pub fn id(&self) -> &'static str {
+        match self {
+            Model::Claude3Opus => "claude-3-opus-20240229",
+            Model::Claude3Sonnet => "claude-3-sonnet-20240229",
+            Model::Claude3Haiku => "claude-3-opus-20240307",
+        }
+    }
+
     pub fn display_name(&self) -> &'static str {
         match self {
             Self::Claude3Opus => "Claude 3 Opus",
@@ -141,20 +153,24 @@ pub enum TextDelta {
 }
 
 pub async fn stream_completion(
-    client: Arc<dyn HttpClient>,
+    client: &dyn HttpClient,
     api_url: &str,
     api_key: &str,
     request: Request,
+    low_speed_timeout: Option<Duration>,
 ) -> Result<BoxStream<'static, Result<ResponseEvent>>> {
     let uri = format!("{api_url}/v1/messages");
-    let request = HttpRequest::builder()
+    let mut request_builder = HttpRequest::builder()
         .method(Method::POST)
         .uri(uri)
         .header("Anthropic-Version", "2023-06-01")
-        .header("Anthropic-Beta", "messages-2023-12-15")
+        .header("Anthropic-Beta", "tools-2024-04-04")
         .header("X-Api-Key", api_key)
-        .header("Content-Type", "application/json")
+        .header("Content-Type", "application/json");
-        .body(AsyncBody::from(serde_json::to_string(&request)?))?;
+    if let Some(low_speed_timeout) = low_speed_timeout {
+        request_builder = request_builder.low_speed_timeout(100, low_speed_timeout);
+    }
+    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());

crates/assistant/Cargo.toml

@@ -11,6 +11,7 @@ doctest = false
 
 [dependencies]
 anyhow.workspace = true
+anthropic = { workspace = true, features = ["schemars"] }
 chrono.workspace = true
 client.workspace = true
 collections.workspace = true

crates/assistant/src/assistant.rs

@@ -7,7 +7,7 @@ mod saved_conversation;
 mod streaming_diff;
 
 pub use assistant_panel::AssistantPanel;
-use assistant_settings::{AssistantSettings, OpenAiModel, ZedDotDevModel};
+use assistant_settings::{AnthropicModel, AssistantSettings, OpenAiModel, ZedDotDevModel};
 use client::{proto, Client};
 use command_palette_hooks::CommandPaletteFilter;
 pub(crate) use completion_provider::*;
@@ -72,6 +72,7 @@ impl Display for Role {
 pub enum LanguageModel {
     ZedDotDev(ZedDotDevModel),
     OpenAi(OpenAiModel),
+    Anthropic(AnthropicModel),
 }
 
 impl Default for LanguageModel {
@@ -84,6 +85,7 @@ impl LanguageModel {
     pub fn telemetry_id(&self) -> String {
         match self {
             LanguageModel::OpenAi(model) => format!("openai/{}", model.id()),
+            LanguageModel::Anthropic(model) => format!("anthropic/{}", model.id()),
             LanguageModel::ZedDotDev(model) => format!("zed.dev/{}", model.id()),
         }
     }
@@ -91,6 +93,7 @@ impl LanguageModel {
     pub fn display_name(&self) -> String {
         match self {
             LanguageModel::OpenAi(model) => model.display_name().into(),
+            LanguageModel::Anthropic(model) => model.display_name().into(),
             LanguageModel::ZedDotDev(model) => model.display_name().into(),
         }
     }
@@ -98,6 +101,7 @@ impl LanguageModel {
     pub fn max_token_count(&self) -> usize {
         match self {
             LanguageModel::OpenAi(model) => model.max_token_count(),
+            LanguageModel::Anthropic(model) => model.max_token_count(),
             LanguageModel::ZedDotDev(model) => model.max_token_count(),
         }
     }
@@ -105,6 +109,7 @@ impl LanguageModel {
     pub fn id(&self) -> &str {
         match self {
             LanguageModel::OpenAi(model) => model.id(),
+            LanguageModel::Anthropic(model) => model.id(),
             LanguageModel::ZedDotDev(model) => model.id(),
         }
     }

crates/assistant/src/assistant_panel.rs

@@ -800,6 +800,11 @@ impl AssistantPanel {
                 open_ai::Model::FourTurbo => open_ai::Model::FourOmni,
                 open_ai::Model::FourOmni => open_ai::Model::ThreePointFiveTurbo,
             }),
+            LanguageModel::Anthropic(model) => LanguageModel::Anthropic(match &model {
+                anthropic::Model::Claude3Opus => anthropic::Model::Claude3Sonnet,
+                anthropic::Model::Claude3Sonnet => anthropic::Model::Claude3Haiku,
+                anthropic::Model::Claude3Haiku => anthropic::Model::Claude3Opus,
+            }),
             LanguageModel::ZedDotDev(model) => LanguageModel::ZedDotDev(match &model {
                 ZedDotDevModel::Gpt3Point5Turbo => ZedDotDevModel::Gpt4,
                 ZedDotDevModel::Gpt4 => ZedDotDevModel::Gpt4Turbo,

crates/assistant/src/assistant_settings.rs

@@ -1,5 +1,6 @@
 use std::fmt;
 
+pub use anthropic::Model as AnthropicModel;
 use gpui::Pixels;
 pub use open_ai::Model as OpenAiModel;
 use schemars::{
@@ -161,6 +162,15 @@ pub enum AssistantProvider {
         #[serde(default)]
         low_speed_timeout_in_seconds: Option<u64>,
     },
+    #[serde(rename = "anthropic")]
+    Anthropic {
+        #[serde(default)]
+        default_model: AnthropicModel,
+        #[serde(default = "anthropic_api_url")]
+        api_url: String,
+        #[serde(default)]
+        low_speed_timeout_in_seconds: Option<u64>,
+    },
 }
 
 impl Default for AssistantProvider {
@@ -172,7 +182,11 @@ impl Default for AssistantProvider {
 }
 
 fn open_ai_url() -> String {
-    "https://api.openai.com/v1".into()
+    open_ai::OPEN_AI_API_URL.to_string()
+}
+
+fn anthropic_api_url() -> String {
+    anthropic::ANTHROPIC_API_URL.to_string()
 }
 
 #[derive(Default, Debug, Deserialize, Serialize)]

crates/assistant/src/completion_provider.rs

@@ -1,8 +1,10 @@
+mod anthropic;
 #[cfg(test)]
 mod fake;
 mod open_ai;
 mod zed;
 
+pub use anthropic::*;
 #[cfg(test)]
 pub use fake::*;
 pub use open_ai::*;
@@ -42,6 +44,17 @@ pub fn init(client: Arc<Client>, cx: &mut AppContext) {
             low_speed_timeout_in_seconds.map(Duration::from_secs),
             settings_version,
         )),
+        AssistantProvider::Anthropic {
+            default_model,
+            api_url,
+            low_speed_timeout_in_seconds,
+        } => CompletionProvider::Anthropic(AnthropicCompletionProvider::new(
+            default_model.clone(),
+            api_url.clone(),
+            client.http_client(),
+            low_speed_timeout_in_seconds.map(Duration::from_secs),
+            settings_version,
+        )),
     };
     cx.set_global(provider);
 
@@ -64,13 +77,28 @@ pub fn init(client: Arc<Client>, cx: &mut AppContext) {
                         settings_version,
                     );
                 }
+                (
+                    CompletionProvider::Anthropic(provider),
+                    AssistantProvider::Anthropic {
+                        default_model,
+                        api_url,
+                        low_speed_timeout_in_seconds,
+                    },
+                ) => {
+                    provider.update(
+                        default_model.clone(),
+                        api_url.clone(),
+                        low_speed_timeout_in_seconds.map(Duration::from_secs),
+                        settings_version,
+                    );
+                }
                 (
                     CompletionProvider::ZedDotDev(provider),
                     AssistantProvider::ZedDotDev { default_model },
                 ) => {
                     provider.update(default_model.clone(), settings_version);
                 }
-                (CompletionProvider::OpenAi(_), AssistantProvider::ZedDotDev { default_model }) => {
+                (_, AssistantProvider::ZedDotDev { default_model }) => {
                     *provider = CompletionProvider::ZedDotDev(ZedDotDevCompletionProvider::new(
                         default_model.clone(),
                         client.clone(),
@@ -79,7 +107,7 @@ pub fn init(client: Arc<Client>, cx: &mut AppContext) {
                     ));
                 }
                 (
-                    CompletionProvider::ZedDotDev(_),
+                    _,
                     AssistantProvider::OpenAi {
                         default_model,
                         api_url,
@@ -94,8 +122,22 @@ pub fn init(client: Arc<Client>, cx: &mut AppContext) {
                         settings_version,
                     ));
                 }
-                #[cfg(test)]
+                (
-                (CompletionProvider::Fake(_), _) => unimplemented!(),
+                    _,
+                    AssistantProvider::Anthropic {
+                        default_model,
+                        api_url,
+                        low_speed_timeout_in_seconds,
+                    },
+                ) => {
+                    *provider = CompletionProvider::Anthropic(AnthropicCompletionProvider::new(
+                        default_model.clone(),
+                        api_url.clone(),
+                        client.http_client(),
+                        low_speed_timeout_in_seconds.map(Duration::from_secs),
+                        settings_version,
+                    ));
+                }
             }
         })
     })
@@ -104,6 +146,7 @@ pub fn init(client: Arc<Client>, cx: &mut AppContext) {
 
 pub enum CompletionProvider {
     OpenAi(OpenAiCompletionProvider),
+    Anthropic(AnthropicCompletionProvider),
     ZedDotDev(ZedDotDevCompletionProvider),
     #[cfg(test)]
     Fake(FakeCompletionProvider),
@@ -119,6 +162,7 @@ impl CompletionProvider {
     pub fn settings_version(&self) -> usize {
         match self {
             CompletionProvider::OpenAi(provider) => provider.settings_version(),
+            CompletionProvider::Anthropic(provider) => provider.settings_version(),
             CompletionProvider::ZedDotDev(provider) => provider.settings_version(),
             #[cfg(test)]
             CompletionProvider::Fake(_) => unimplemented!(),
@@ -128,6 +172,7 @@ impl CompletionProvider {
     pub fn is_authenticated(&self) -> bool {
         match self {
             CompletionProvider::OpenAi(provider) => provider.is_authenticated(),
+            CompletionProvider::Anthropic(provider) => provider.is_authenticated(),
             CompletionProvider::ZedDotDev(provider) => provider.is_authenticated(),
             #[cfg(test)]
             CompletionProvider::Fake(_) => true,
@@ -137,6 +182,7 @@ impl CompletionProvider {
     pub fn authenticate(&self, cx: &AppContext) -> Task<Result<()>> {
         match self {
             CompletionProvider::OpenAi(provider) => provider.authenticate(cx),
+            CompletionProvider::Anthropic(provider) => provider.authenticate(cx),
             CompletionProvider::ZedDotDev(provider) => provider.authenticate(cx),
             #[cfg(test)]
             CompletionProvider::Fake(_) => Task::ready(Ok(())),
@@ -146,6 +192,7 @@ impl CompletionProvider {
     pub fn authentication_prompt(&self, cx: &mut WindowContext) -> AnyView {
         match self {
             CompletionProvider::OpenAi(provider) => provider.authentication_prompt(cx),
+            CompletionProvider::Anthropic(provider) => provider.authentication_prompt(cx),
             CompletionProvider::ZedDotDev(provider) => provider.authentication_prompt(cx),
             #[cfg(test)]
             CompletionProvider::Fake(_) => unimplemented!(),
@@ -155,6 +202,7 @@ impl CompletionProvider {
     pub fn reset_credentials(&self, cx: &AppContext) -> Task<Result<()>> {
         match self {
             CompletionProvider::OpenAi(provider) => provider.reset_credentials(cx),
+            CompletionProvider::Anthropic(provider) => provider.reset_credentials(cx),
             CompletionProvider::ZedDotDev(_) => Task::ready(Ok(())),
             #[cfg(test)]
             CompletionProvider::Fake(_) => Task::ready(Ok(())),
@@ -164,6 +212,9 @@ impl CompletionProvider {
     pub fn default_model(&self) -> LanguageModel {
         match self {
             CompletionProvider::OpenAi(provider) => LanguageModel::OpenAi(provider.default_model()),
+            CompletionProvider::Anthropic(provider) => {
+                LanguageModel::Anthropic(provider.default_model())
+            }
             CompletionProvider::ZedDotDev(provider) => {
                 LanguageModel::ZedDotDev(provider.default_model())
             }
@@ -179,6 +230,7 @@ impl CompletionProvider {
     ) -> BoxFuture<'static, Result<usize>> {
         match self {
             CompletionProvider::OpenAi(provider) => provider.count_tokens(request, cx),
+            CompletionProvider::Anthropic(provider) => provider.count_tokens(request, cx),
             CompletionProvider::ZedDotDev(provider) => provider.count_tokens(request, cx),
             #[cfg(test)]
             CompletionProvider::Fake(_) => unimplemented!(),
@@ -191,6 +243,7 @@ impl CompletionProvider {
     ) -> BoxFuture<'static, Result<BoxStream<'static, Result<String>>>> {
         match self {
             CompletionProvider::OpenAi(provider) => provider.complete(request),
+            CompletionProvider::Anthropic(provider) => provider.complete(request),
             CompletionProvider::ZedDotDev(provider) => provider.complete(request),
             #[cfg(test)]
             CompletionProvider::Fake(provider) => provider.complete(),

crates/assistant/src/completion_provider/anthropic.rs

@@ -0,0 +1,317 @@
+use crate::count_open_ai_tokens;
+use crate::{
+    assistant_settings::AnthropicModel, CompletionProvider, LanguageModel, LanguageModelRequest,
+    Role,
+};
+use anthropic::{stream_completion, Request, RequestMessage, Role as AnthropicRole};
+use anyhow::{anyhow, Result};
+use editor::{Editor, EditorElement, EditorStyle};
+use futures::{future::BoxFuture, stream::BoxStream, FutureExt, StreamExt};
+use gpui::{AnyView, AppContext, FontStyle, FontWeight, Task, TextStyle, View, WhiteSpace};
+use http::HttpClient;
+use settings::Settings;
+use std::time::Duration;
+use std::{env, sync::Arc};
+use theme::ThemeSettings;
+use ui::prelude::*;
+use util::ResultExt;
+
+pub struct AnthropicCompletionProvider {
+    api_key: Option<String>,
+    api_url: String,
+    default_model: AnthropicModel,
+    http_client: Arc<dyn HttpClient>,
+    low_speed_timeout: Option<Duration>,
+    settings_version: usize,
+}
+
+impl AnthropicCompletionProvider {
+    pub fn new(
+        default_model: AnthropicModel,
+        api_url: String,
+        http_client: Arc<dyn HttpClient>,
+        low_speed_timeout: Option<Duration>,
+        settings_version: usize,
+    ) -> Self {
+        Self {
+            api_key: None,
+            api_url,
+            default_model,
+            http_client,
+            low_speed_timeout,
+            settings_version,
+        }
+    }
+
+    pub fn update(
+        &mut self,
+        default_model: AnthropicModel,
+        api_url: String,
+        low_speed_timeout: Option<Duration>,
+        settings_version: usize,
+    ) {
+        self.default_model = default_model;
+        self.api_url = api_url;
+        self.low_speed_timeout = low_speed_timeout;
+        self.settings_version = settings_version;
+    }
+
+    pub fn settings_version(&self) -> usize {
+        self.settings_version
+    }
+
+    pub fn is_authenticated(&self) -> bool {
+        self.api_key.is_some()
+    }
+
+    pub fn authenticate(&self, cx: &AppContext) -> Task<Result<()>> {
+        if self.is_authenticated() {
+            Task::ready(Ok(()))
+        } else {
+            let api_url = self.api_url.clone();
+            cx.spawn(|mut cx| async move {
+                let api_key = if let Ok(api_key) = env::var("ANTHROPIC_API_KEY") {
+                    api_key
+                } 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)?
+                };
+                cx.update_global::<CompletionProvider, _>(|provider, _cx| {
+                    if let CompletionProvider::Anthropic(provider) = provider {
+                        provider.api_key = Some(api_key);
+                    }
+                })
+            })
+        }
+    }
+
+    pub fn reset_credentials(&self, cx: &AppContext) -> Task<Result<()>> {
+        let delete_credentials = cx.delete_credentials(&self.api_url);
+        cx.spawn(|mut cx| async move {
+            delete_credentials.await.log_err();
+            cx.update_global::<CompletionProvider, _>(|provider, _cx| {
+                if let CompletionProvider::Anthropic(provider) = provider {
+                    provider.api_key = None;
+                }
+            })
+        })
+    }
+
+    pub fn authentication_prompt(&self, cx: &mut WindowContext) -> AnyView {
+        cx.new_view(|cx| AuthenticationPrompt::new(self.api_url.clone(), cx))
+            .into()
+    }
+
+    pub fn default_model(&self) -> AnthropicModel {
+        self.default_model.clone()
+    }
+
+    pub fn count_tokens(
+        &self,
+        request: LanguageModelRequest,
+        cx: &AppContext,
+    ) -> BoxFuture<'static, Result<usize>> {
+        count_open_ai_tokens(request, cx.background_executor())
+    }
+
+    pub fn complete(
+        &self,
+        request: LanguageModelRequest,
+    ) -> BoxFuture<'static, Result<BoxStream<'static, Result<String>>>> {
+        let request = self.to_anthropic_request(request);
+
+        let http_client = self.http_client.clone();
+        let api_key = self.api_key.clone();
+        let api_url = self.api_url.clone();
+        let low_speed_timeout = self.low_speed_timeout;
+        async move {
+            let api_key = api_key.ok_or_else(|| anyhow!("missing api key"))?;
+            let request = stream_completion(
+                http_client.as_ref(),
+                &api_url,
+                &api_key,
+                request,
+                low_speed_timeout,
+            );
+            let response = request.await?;
+            let stream = response
+                .filter_map(|response| async move {
+                    match response {
+                        Ok(response) => match response {
+                            anthropic::ResponseEvent::ContentBlockStart {
+                                content_block, ..
+                            } => match content_block {
+                                anthropic::ContentBlock::Text { text } => Some(Ok(text)),
+                            },
+                            anthropic::ResponseEvent::ContentBlockDelta { delta, .. } => {
+                                match delta {
+                                    anthropic::TextDelta::TextDelta { text } => Some(Ok(text)),
+                                }
+                            }
+                            _ => None,
+                        },
+                        Err(error) => Some(Err(error)),
+                    }
+                })
+                .boxed();
+            Ok(stream)
+        }
+        .boxed()
+    }
+
+    fn to_anthropic_request(&self, request: LanguageModelRequest) -> Request {
+        let model = match request.model {
+            LanguageModel::Anthropic(model) => model,
+            _ => self.default_model(),
+        };
+
+        let mut system_message = String::new();
+        let messages = request
+            .messages
+            .into_iter()
+            .filter_map(|message| {
+                match message.role {
+                    Role::User => Some(RequestMessage {
+                        role: AnthropicRole::User,
+                        content: message.content,
+                    }),
+                    Role::Assistant => Some(RequestMessage {
+                        role: AnthropicRole::Assistant,
+                        content: message.content,
+                    }),
+                    // Anthropic's API breaks system instructions out as a separate field rather
+                    // than having a system message role.
+                    Role::System => {
+                        if !system_message.is_empty() {
+                            system_message.push_str("\n\n");
+                        }
+                        system_message.push_str(&message.content);
+
+                        None
+                    }
+                }
+            })
+            .collect();
+
+        Request {
+            model,
+            messages,
+            stream: true,
+            system: system_message,
+            max_tokens: 4092,
+        }
+    }
+}
+
+struct AuthenticationPrompt {
+    api_key: View<Editor>,
+    api_url: String,
+}
+
+impl AuthenticationPrompt {
+    fn new(api_url: String, cx: &mut WindowContext) -> Self {
+        Self {
+            api_key: cx.new_view(|cx| {
+                let mut editor = Editor::single_line(cx);
+                editor.set_placeholder_text(
+                    "sk-000000000000000000000000000000000000000000000000",
+                    cx,
+                );
+                editor
+            }),
+            api_url,
+        }
+    }
+
+    fn save_api_key(&mut self, _: &menu::Confirm, cx: &mut ViewContext<Self>) {
+        let api_key = self.api_key.read(cx).text(cx);
+        if api_key.is_empty() {
+            return;
+        }
+
+        let write_credentials = cx.write_credentials(&self.api_url, "Bearer", api_key.as_bytes());
+        cx.spawn(|_, mut cx| async move {
+            write_credentials.await?;
+            cx.update_global::<CompletionProvider, _>(|provider, _cx| {
+                if let CompletionProvider::Anthropic(provider) = provider {
+                    provider.api_key = Some(api_key);
+                }
+            })
+        })
+        .detach_and_log_err(cx);
+    }
+
+    fn render_api_key_editor(&self, cx: &mut ViewContext<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_size: rems(0.875).into(),
+            font_weight: FontWeight::NORMAL,
+            font_style: FontStyle::Normal,
+            line_height: relative(1.3),
+            background_color: None,
+            underline: None,
+            strikethrough: None,
+            white_space: WhiteSpace::Normal,
+        };
+        EditorElement::new(
+            &self.api_key,
+            EditorStyle {
+                background: cx.theme().colors().editor_background,
+                local_player: cx.theme().players().local(),
+                text: text_style,
+                ..Default::default()
+            },
+        )
+    }
+}
+
+impl Render for AuthenticationPrompt {
+    fn render(&mut self, cx: &mut ViewContext<Self>) -> impl IntoElement {
+        const INSTRUCTIONS: [&str; 4] = [
+            "To use the assistant panel or inline assistant, you need to add your Anthropic API key.",
+            "You can create an API key at: https://console.anthropic.com/settings/keys",
+            "",
+            "Paste your Anthropic API key below and hit enter to use the assistant:",
+        ];
+
+        v_flex()
+            .p_4()
+            .size_full()
+            .on_action(cx.listener(Self::save_api_key))
+            .children(
+                INSTRUCTIONS.map(|instruction| Label::new(instruction).size(LabelSize::Small)),
+            )
+            .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(
+                    "You can also assign the ANTHROPIC_API_KEY environment variable and restart Zed.",
+                )
+                .size(LabelSize::Small),
+            )
+            .child(
+                h_flex()
+                    .gap_2()
+                    .child(Label::new("Click on").size(LabelSize::Small))
+                    .child(Icon::new(IconName::Ai).size(IconSize::XSmall))
+                    .child(
+                        Label::new("in the status bar to close this panel.").size(LabelSize::Small),
+                    ),
+            )
+            .into_any()
+    }
+}

crates/assistant/src/completion_provider/open_ai.rs

@@ -151,8 +151,8 @@ impl OpenAiCompletionProvider {
 
     fn to_open_ai_request(&self, request: LanguageModelRequest) -> Request {
         let model = match request.model {
-            LanguageModel::ZedDotDev(_) => self.default_model(),
             LanguageModel::OpenAi(model) => model,
+            _ => self.default_model(),
         };
 
         Request {
@@ -205,8 +205,12 @@ pub fn count_open_ai_tokens(
 
             match request.model {
                 LanguageModel::OpenAi(OpenAiModel::FourOmni)
-                | LanguageModel::ZedDotDev(ZedDotDevModel::Gpt4Omni) => {
+                | LanguageModel::ZedDotDev(ZedDotDevModel::Gpt4Omni)
-                    // Tiktoken doesn't yet support gpt-4o, so we manually use the
+                | LanguageModel::Anthropic(_)
+                | LanguageModel::ZedDotDev(ZedDotDevModel::Claude3Opus)
+                | LanguageModel::ZedDotDev(ZedDotDevModel::Claude3Sonnet)
+                | LanguageModel::ZedDotDev(ZedDotDevModel::Claude3Haiku) => {
+                    // Tiktoken doesn't yet support these models, so we manually use the
                     // same tokenizer as GPT-4.
                     tiktoken_rs::num_tokens_from_messages("gpt-4", &messages)
                 }

crates/assistant/src/completion_provider/zed.rs

@@ -78,7 +78,6 @@ impl ZedDotDevCompletionProvider {
         cx: &AppContext,
     ) -> BoxFuture<'static, Result<usize>> {
         match request.model {
-            LanguageModel::OpenAi(_) => future::ready(Err(anyhow!("invalid model"))).boxed(),
             LanguageModel::ZedDotDev(ZedDotDevModel::Gpt4)
             | LanguageModel::ZedDotDev(ZedDotDevModel::Gpt4Turbo)
             | LanguageModel::ZedDotDev(ZedDotDevModel::Gpt4Omni)
@@ -108,6 +107,7 @@ impl ZedDotDevCompletionProvider {
                 }
                 .boxed()
             }
+            _ => future::ready(Err(anyhow!("invalid model"))).boxed(),
         }
     }
 

crates/collab/src/rpc.rs

@@ -4489,8 +4489,8 @@ async fn complete_with_anthropic(
         .collect();
 
     let mut stream = anthropic::stream_completion(
-        session.http_client.clone(),
+        session.http_client.as_ref(),
-        "https://api.anthropic.com",
+        anthropic::ANTHROPIC_API_URL,
         &api_key,
         anthropic::Request {
             model,
@@ -4499,6 +4499,7 @@ async fn complete_with_anthropic(
             system: system_message,
             max_tokens: 4092,
         },
+        None,
     )
     .await?;