fix: Update model names to remove preview versions

tests/unit/test_gemini_model.py

@@ -49,14 +49,14 @@ class TestGeminiModel:
         """Test setting the model name."""
         model = GeminiModel()
         # Valid model name
-        assert model.set_model_name("gemini-2.5-flash-preview-05-20") is True
-        assert model.model_name == "gemini-2.5-flash-preview-05-20"
+        assert model.set_model_name("gemini-2.5-flash") is True
+        assert model.model_name == "gemini-2.5-flash"
         # Non-existent model
         assert model.set_model_name("nonexistent-model") is False
-        assert model.model_name == "gemini-2.5-flash-preview-05-20"  # Should not change
+        assert model.model_name == "gemini-2.5-flash"  # Should not change
         # Empty model name
         assert model.set_model_name("") is False
-        assert model.model_name == "gemini-2.5-flash-preview-05-20"  # Should not change
+        assert model.model_name == "gemini-2.5-flash"  # Should not change
 
     @patch("google.genai.Client")
     def test_generate_text_success(self, mock_client):

yomitalk/models/gemini_model.py

@@ -17,10 +17,10 @@ class GeminiModel:
 
     # Class-level constants for model configuration
     AVAILABLE_MODELS = [
-        "gemini-2.5-flash-preview-05-20",
-        "gemini-2.5-pro-preview-05-06",
+        "gemini-2.5-flash",
+        "gemini-2.5-pro",
     ]
-    DEFAULT_MODEL = "gemini-2.5-flash-preview-05-20"
+    DEFAULT_MODEL = "gemini-2.5-flash"
     DEFAULT_MAX_TOKENS = 65536
 
     def __init__(self) -> None: