agent eval: Fix --model arg and add --provider (#29883)

Release Notes:

- N/A

crates/eval/src/eval.rs

@@ -46,9 +46,12 @@ struct Args {
     /// Runs all examples and threads that contain these substrings. If unspecified, all examples and threads are run.
     #[arg(value_name = "EXAMPLE_SUBSTRING")]
     filter: Vec<String>,
-    /// Model to use (default: "claude-3-7-sonnet-latest")
+    /// ID of model to use.
     #[arg(long, default_value = "claude-3-7-sonnet-latest")]
     model: String,
+    /// Model provider to use.
+    #[arg(long, default_value = "anthropic")]
+    provider: String,
     #[arg(long, value_delimiter = ',', default_value = "rs,ts")]
     languages: Vec<String>,
     /// How many times to run each example.
@@ -123,7 +126,7 @@ fn main() {
         let mut cumulative_tool_metrics = ToolMetrics::default();
 
         let model_registry = LanguageModelRegistry::read_global(cx);
-        let model = find_model("claude-3-7-sonnet-latest", model_registry, cx).unwrap();
+        let model = find_model(&args.provider, &args.model, model_registry, cx).unwrap();
         let model_provider_id = model.provider_id();
         let model_provider = model_registry.provider(&model_provider_id).unwrap();
 
@@ -452,27 +455,36 @@ pub fn init(cx: &mut App) -> Arc<AgentAppState> {
 }
 
 pub fn find_model(
-    model_name: &str,
+    provider_id: &str,
+    model_id: &str,
     model_registry: &LanguageModelRegistry,
     cx: &App,
 ) -> anyhow::Result<Arc<dyn LanguageModel>> {
-    let model = model_registry
+    let matching_models = model_registry
         .available_models(cx)
-        .find(|model| model.id().0 == model_name);
+        .filter(|model| model.id().0 == model_id && model.provider_id().0 == provider_id)
+        .collect::<Vec<_>>();
 
-    let Some(model) = model else {
-        return Err(anyhow!(
-            "No language model named {} was available. Available models: {}",
-            model_name,
+    match matching_models.as_slice() {
+        [model] => Ok(model.clone()),
+        [] => Err(anyhow!(
+            "No language model with ID {} was available. Available models: {}",
+            model_id,
             model_registry
                 .available_models(cx)
                 .map(|model| model.id().0.clone())
                 .collect::<Vec<_>>()
                 .join(", ")
-        ));
-    };
-
-    Ok(model)
+        )),
+        _ => Err(anyhow!(
+            "Multiple language models with ID {} available - use `--provider` to choose one of: {:?}",
+            model_id,
+            matching_models
+                .iter()
+                .map(|model| model.provider_id().0)
+                .collect::<Vec<_>>()
+        )),
+    }
 }
 
 pub fn commit_sha_for_path(repo_path: &Path) -> String {