diff --git a/llm/client.py b/llm/client.py
index 9f21798..e27fc8e 100644
--- a/llm/client.py
+++ b/llm/client.py
@@ -19,15 +19,39 @@ def __init__(self, model: str = "gpt-4.1", temperature: float = 0.2):
         self.temperature = temperature
         self.client = None
 
-        api_key = os.environ.get("OPENAI_API_KEY")
-        if OpenAI and api_key:
-            self.client = OpenAI(api_key=api_key)
-            self.enabled = True
-        else:
+        # Select provider via environment variable. Supported: "openai" (default), "cerebras".
+        provider = os.environ.get("LLM_PROVIDER", "openai").lower()
+
+        if not OpenAI:
             self.enabled = False
-            if not OpenAI:
-                logger.warning("openai package not installed; LLM calls are mocked")
+            logger.warning("openai package not installed; LLM calls are mocked")
+            return
+
+        if provider == "cerebras":
+            api_key = os.environ.get("CEREBRAS_API_KEY")
+            base_url = os.environ.get("CEREBRAS_BASE_URL", "https://api.cerebras.ai/v1")
+            if api_key:
+                try:
+                    self.client = OpenAI(base_url=base_url, api_key=api_key)
+                    self.enabled = True
+                except Exception:
+                    logger.exception("failed to initialize Cerebras LLM client")
+                    self.enabled = False
+            else:
+                self.enabled = False
+                logger.warning("CEREBRAS_API_KEY not set; LLM calls are mocked")
+        else:
+            # default: OpenAI
+            api_key = os.environ.get("OPENAI_API_KEY")
+            if api_key:
+                try:
+                    self.client = OpenAI(api_key=api_key)
+                    self.enabled = True
+                except Exception:
+                    logger.exception("failed to initialize OpenAI LLM client")
+                    self.enabled = False
             else:
+                self.enabled = False
                 logger.warning("OPENAI_API_KEY not set; LLM calls are mocked")
 
     def _mock_response(self, prompt: str) -> str: