Move to GPT for API consistency

drb-c2-core/app/internal/summarizer.py

@@ -76,14 +76,11 @@ async def _summarize_incident(inc: dict) -> None:
 
 def _sync_summarize(inc: dict, transcripts: list[str]) -> Optional[str]:
     from app.config import settings
-    import google.generativeai as genai
+    from openai import OpenAI
 
-    if not settings.gemini_api_key:
+    if not settings.openai_api_key:
         return None
 
-    genai.configure(api_key=settings.gemini_api_key)
-    model = genai.GenerativeModel("gemini-2.5-flash-lite")
-
     inc_type = inc.get("type", "unknown")
     location = inc.get("location") or "unknown location"
     tg_ids = ", ".join(inc.get("talkgroup_ids", [])) or "unknown"
@@ -107,8 +104,12 @@ Write a concise factual summary of this incident in 2-4 sentences. Include:
 Be factual. Do not speculate beyond what the transcripts say. Do not use bullet points."""
 
     try:
-        response = model.generate_content(prompt)
-        return response.text.strip() or None
+        client = OpenAI(api_key=settings.openai_api_key)
+        response = client.chat.completions.create(
+            model="gpt-4o-mini",
+            messages=[{"role": "user", "content": prompt}],
+        )
+        return response.choices[0].message.content.strip() or None
     except Exception as e:
-        logger.warning(f"Gemini summary failed: {e}")
+        logger.warning(f"GPT-4o mini summary failed: {e}")
         return None