Update default model to Opus 4.6 and refresh OpenRouter model list

- Add claude-opus-4-6 as default model for Claude provider
- Update OpenRouter models: add Gemini 2.5 Flash, GPT-4.1, o3
- Replace deprecated GPT-4o with GPT-4.1

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: nioasoft

registry.py

@@ -46,6 +46,7 @@ def _migrate_registry_dir() -> None:
 # Available models with display names
 # To add a new model: add an entry here with {"id": "model-id", "name": "Display Name"}
 AVAILABLE_MODELS = [
+    {"id": "claude-opus-4-6", "name": "Claude Opus 4.6"},
     {"id": "claude-opus-4-5-20251101", "name": "Claude Opus 4.5"},
     {"id": "claude-sonnet-4-5-20250929", "name": "Claude Sonnet 4.5"},
 ]
@@ -59,7 +60,7 @@ def _migrate_registry_dir() -> None:
 _env_default_model = os.getenv("ANTHROPIC_DEFAULT_OPUS_MODEL")
 if _env_default_model is not None:
     _env_default_model = _env_default_model.strip()
-DEFAULT_MODEL = _env_default_model or "claude-opus-4-5-20251101"
+DEFAULT_MODEL = _env_default_model or "claude-opus-4-6"
 
 # Ensure env-provided DEFAULT_MODEL is in VALID_MODELS for validation consistency
 # (idempotent: only adds if missing, doesn't alter AVAILABLE_MODELS semantics)
@@ -624,10 +625,11 @@ def get_all_settings() -> dict[str, str]:
         "base_url": None,
         "requires_auth": False,
         "models": [
+            {"id": "claude-opus-4-6", "name": "Claude Opus 4.6"},
             {"id": "claude-opus-4-5-20251101", "name": "Claude Opus 4.5"},
             {"id": "claude-sonnet-4-5-20250929", "name": "Claude Sonnet 4.5"},
         ],
-        "default_model": "claude-opus-4-5-20251101",
+        "default_model": "claude-opus-4-6",
     },
     "kimi": {
         "name": "Kimi K2.5 (Moonshot)",
@@ -665,9 +667,11 @@ def get_all_settings() -> dict[str, str]:
         "auth_env_var": "ANTHROPIC_API_KEY",
         "models": [
             {"id": "anthropic/claude-sonnet-4-5", "name": "Claude Sonnet 4.5"},
-            {"id": "anthropic/claude-opus-4", "name": "Claude Opus 4"},
+            {"id": "anthropic/claude-opus-4.6", "name": "Claude Opus 4.6"},
             {"id": "google/gemini-2.5-pro", "name": "Gemini 2.5 Pro"},
-            {"id": "openai/gpt-4o", "name": "GPT-4o"},
+            {"id": "google/gemini-2.5-flash", "name": "Gemini 2.5 Flash"},
+            {"id": "openai/gpt-4.1", "name": "GPT-4.1"},
+            {"id": "openai/o3", "name": "OpenAI o3"},
             {"id": "deepseek/deepseek-chat-v3-0324", "name": "DeepSeek V3"},
         ],
         "default_model": "anthropic/claude-sonnet-4-5",