feat: update base LLM & search model

Author: k9mil

backend/api/ai/services/chat_service.py

@@ -4,7 +4,7 @@
 from api.ai.connectors.openrouter_connector import OpenRouterConnector
 from api.ai.services.prompt_service import PromptService
 
-LLM_MODEL: str = "qwen/qwen3-235b-a22b-2507"
+LLM_MODEL: str = "openai/gpt-oss-120b"
 LLM_TEMPERATURE: float = 0
 
 CHAT_PROMPT_PATH: str = "api/prompts/chat.prompt"

backend/api/ai/services/scheduling_service.py

@@ -8,7 +8,7 @@
 from api.ai.services.tools_service import ToolsService
 from api.ai.services.transcription_service import TranscriptionService
 
-LLM_MODEL: str = "qwen/qwen3-235b-a22b-2507"
+LLM_MODEL: str = "openai/gpt-oss-120b"
 LLM_TEMPERATURE: float = 0
 
 handler = CallbackHandler()

backend/api/ai/services/search_service.py

@@ -2,7 +2,7 @@
 
 from api.ai.connectors.exa_connector import ExaConnector
 
-EXA_MODEL = "exa-fast-preview"
+EXA_MODEL = "exa"
 
 
 class SearchService: