Replace deprecated google model.

Author: superdosh

src/modelgauge/sut_factory.py

@@ -107,7 +107,7 @@ class SUTType(Enum):
     # BaseTen
     "nvidia-llama-3.3-49b-nemotron-super": "baseten_api",
     # Google
-    "google-genai-gemini-2.5-flash-preview-05-20-no-reasoning": "google_genai",
+    "google-genai-gemini-2.5-flash-preview-09-2025-no-reasoning": "google_genai",
     "gemini-2.0-flash": "google_generativeai",
     "gemini-2.0-flash-lite": "google_generativeai",
     "gemini-2.0-flash-001": "google_generativeai",

src/modelgauge/suts/google_genai.py

@@ -105,7 +105,7 @@ def translate_response(self, request: GenAiRequest, response: GenerateContentRes
         return SUTResponse(text=response_text)
 
 
-models = ["gemini-2.5-flash-preview-05-20"]
+models = ["gemini-2.5-flash-preview-09-2025"]
 for model in models:
     SUTS.register(
         GoogleGenAiSUT,