Changeset 0.5.0 (#35)

server/providers/anthropic.go

@@ -116,14 +116,26 @@ func (p *AnthropicProvider) StreamCompletion(ctx context.Context, cfg ProviderCo
 
 func (p *AnthropicProvider) ListModels(_ context.Context, _ ProviderConfig) ([]Model, error) {
 	// Anthropic doesn't have a list models endpoint.
-	// Return the known model families.
-	return []Model{
-		{ID: "claude-sonnet-4-20250514", Name: "Claude Sonnet 4"},
-		{ID: "claude-haiku-4-20250414", Name: "Claude Haiku 4"},
-		{ID: "claude-opus-4-20250514", Name: "Claude Opus 4"},
-		{ID: "claude-3-5-sonnet-20241022", Name: "Claude 3.5 Sonnet"},
-		{ID: "claude-3-5-haiku-20241022", Name: "Claude 3.5 Haiku"},
-	}, nil
+	// Return known models with authoritative capabilities from our table.
+	modelIDs := []struct{ id, name string }{
+		{"claude-opus-4-20250514", "Claude Opus 4"},
+		{"claude-sonnet-4-20250514", "Claude Sonnet 4"},
+		{"claude-haiku-4-20250414", "Claude Haiku 4"},
+		{"claude-3-5-sonnet-20241022", "Claude 3.5 Sonnet"},
+		{"claude-3-5-haiku-20241022", "Claude 3.5 Haiku"},
+	}
+
+	models := make([]Model, 0, len(modelIDs))
+	for _, m := range modelIDs {
+		caps, _ := LookupKnownModel(m.id)
+		models = append(models, Model{
+			ID:           m.id,
+			Name:         m.name,
+			OwnedBy:      "anthropic",
+			Capabilities: caps,
+		})
+	}
+	return models, nil
 }
 
 // ── HTTP Layer ──────────────────────────────
@@ -160,7 +172,8 @@ func (p *AnthropicProvider) doRequest(ctx context.Context, cfg ProviderConfig, r
 		antReq.System = system
 	}
 	if antReq.MaxTokens == 0 {
-		antReq.MaxTokens = 4096 // Anthropic requires max_tokens
+		// Anthropic requires max_tokens. Resolve from known model table.
+		antReq.MaxTokens = ResolveMaxOutput(req.Model, ModelCapabilities{})
 	}
 	if req.Temperature != nil {
 		antReq.Temperature = req.Temperature