Add claude-opus-5 model support

Anthropic released Claude Opus 5 (claude-opus-5) today, succeeding
Opus 4.8. Add it to the subscription alias catalog and update the
Claude provider default model in settings.

Co-Authored-By: Claude Sonnet 5 <[email protected]>

Author: ofekron

backend/models.py

@@ -71,6 +71,8 @@
     "sonnet[1m]",
     "haiku",
     "claude-fable-5",
+    "claude-opus-5[1m]",
+    "claude-opus-5",
     "claude-opus-4-8[1m]",
     "claude-opus-4-8",
     "claude-sonnet-5",

backend/scripts/test_anthropic_model_catalog.py

@@ -34,6 +34,8 @@ def test_subscription_cold_start_uses_current_anthropic_models() -> bool:
         "sonnet[1m]",
         "haiku",
         "claude-fable-5",
+        "claude-opus-5[1m]",
+        "claude-opus-5",
         "claude-opus-4-8[1m]",
         "claude-opus-4-8",
         "claude-sonnet-5",

frontend/src/components/SettingsPage.tsx

@@ -241,7 +241,7 @@ const TEMPLATES: Template[] = [
       mode: "subscription",
       base_url: "",
       config_dir: "",
-      default_model: "claude-opus-4-8[1m]",
+      default_model: "claude-opus-5[1m]",
       default_reasoning_effort: "medium",
     },
   },
@@ -3507,7 +3507,7 @@ function ProviderForm({
                 type="text"
                 value={defaultModel}
                 onChange={(e) => setDefaultModel(e.target.value)}
-                placeholder="sonnet, glm-4.6, claude-opus-4-8[1m], …"
+                placeholder="sonnet, glm-4.6, claude-opus-5[1m], …"
                 spellCheck={false}
               />
               {mode === "edit" && modelOptions !== null && (