diff --git a/llm_providers.py b/llm_providers.py
index c1397d7..00a2d12 100644
--- a/llm_providers.py
+++ b/llm_providers.py
@@ -222,8 +222,17 @@ async def _call_openrouter_async(model: str, prompt: str, system_prompt: str = N
         async with httpx.AsyncClient() as client:
             res = await client.post(url, json=payload, headers=headers, timeout=120)
             if res.status_code == 200:
-                return res.json()["choices"][0]["message"]["content"]
-            return f"Erro OpenRouter: {res.status_code} - {res.text}"
+                data = res.json()
+                if "choices" in data and len(data["choices"]) > 0:
+                    return data["choices"][0]["message"]["content"]
+                return f"Erro OpenRouter (Resposta sem 'choices'): {json.dumps(data)}"
+            
+            # Se não for 200, tenta extrair erro detalhado
+            try:
+                error_data = res.json()
+                return f"Erro OpenRouter {res.status_code}: {json.dumps(error_data)}"
+            except:
+                return f"Erro OpenRouter: {res.status_code} - {res.text}"
     except Exception as e:
         return f"Erro OpenRouter: {str(e)}"