Switching to x.ai for reviews

scripts/ai_code_review.py

@@ -190,12 +190,19 @@ def request_review(diff_text: str) -> str:
             "The 'openai' package is not installed. Install it with 'pip install openai'."
         ) from exc
 
-    api_key = os.getenv("OPENAI_API_KEY")
+    api_key = os.getenv("XAI_API_KEY") or os.getenv("OPENAI_API_KEY")
     if not api_key:
-        raise RuntimeError("OPENAI_API_KEY is not set.")
+        raise RuntimeError("XAI_API_KEY is not set.")
 
-    model = os.getenv("CODEX_MODEL") or os.getenv("OPENAI_MODEL") or "gpt-4.1"
-    client = OpenAI(api_key=api_key)
+    model = (
+        os.getenv("AI_REVIEW_MODEL")
+        or os.getenv("XAI_MODEL")
+        or os.getenv("CODEX_MODEL")
+        or os.getenv("OPENAI_MODEL")
+        or "grok-4.3"
+    )
+    base_url = os.getenv("XAI_BASE_URL") or "https://api.x.ai/v1"
+    client = OpenAI(api_key=api_key, base_url=base_url)
 
     response = client.responses.create(
         model=model,