Add OPENAI_VISION_MODEL

.env.example

@@ -1,5 +1,8 @@
 OPENAI_API_KEY=
 MODEL_NAME="gpt-4o-realtime-preview-2025-06-03"
 
+# Vision model (Responses API, multimodal)
+OPENAI_VISION_MODEL="gpt-4.1-mini"
+
 # Cache for local VLM
 HF_HOME=./cache

src/reachy_mini_conversation_demo/config.py

@@ -20,6 +20,7 @@ class Config:
 
     # Optional
     MODEL_NAME = os.getenv("MODEL_NAME", "gpt-4o-realtime-preview")
+    OPENAI_VISION_MODEL = os.getenv("OPENAI_VISION_MODEL", "gpt-4.1-mini")
     HF_HOME = os.getenv("HF_HOME", "./cache")