Fix: OpenRouter/Together/Fireworks detection + deprecated gpt-4-turbo-preview model

Issues fixed:
- OpenRouter API key not recognized: _set_no_provider_error() now checks all 7
  provider keys (was only checking Anthropic/OpenAI/Google), so users with only
  OPENROUTER_API_KEY set no longer get "No API keys configured" error
- Error message now lists all 8 providers (added OpenRouter, Together, Fireworks)
  instead of only 5 (Anthropic, OpenAI, Google, Ollama, LM Studio)
- gpt-4-turbo-preview (deprecated by OpenAI, 404 error) replaced with gpt-4o
  as default OpenAI model in LLMClient init and generate() fallback
- Settings API model list updated: removed gpt-4-turbo-preview and o1-preview/mini,
  added gpt-4.1, gpt-4.1-mini, o3-mini
- .env.example comment updated to reference gpt-4o instead of gpt-4-turbo

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.env.example

@@ -41,7 +41,7 @@ FIREWORKS_API_KEY=
 # Max output tokens (up to 64000 for Claude). Comment out for profile defaults.
 #MAX_OUTPUT_TOKENS=64000
 
-# Select specific model name (e.g., claude-sonnet-4-20250514, gpt-4-turbo, llama3.2, qwen2.5)
+# Select specific model name (e.g., claude-sonnet-4-20250514, gpt-4o, llama3.2, qwen2.5)
 # Leave empty for provider default
 #DEFAULT_LLM_MODEL=
 

backend/api/v1/agent.py

@@ -1856,17 +1856,26 @@ async def send_realtime_message(session_id: str, request: RealtimeMessageRequest
             if not llm_status.get("lmstudio_available"):
                 error_details.append("LM Studio not running")
             if not llm_status.get("has_google_key"):
-                error_details.append("No GOOGLE_API_KEY set")
+                error_details.append("No GEMINI_API_KEY set")
+            if not llm_status.get("has_openrouter_key"):
+                error_details.append("No OPENROUTER_API_KEY set")
+            if not llm_status.get("has_together_key"):
+                error_details.append("No TOGETHER_API_KEY set")
+            if not llm_status.get("has_fireworks_key"):
+                error_details.append("No FIREWORKS_API_KEY set")
 
             error_msg = f"""⚠️ **No LLM Provider Available**
 
-Configure at least one of the following:
+Configure at least one of the following in your `.env` file:
 
-1. **Claude (Anthropic)**: Set `ANTHROPIC_API_KEY` environment variable
-2. **OpenAI/ChatGPT**: Set `OPENAI_API_KEY` environment variable
-3. **Google Gemini**: Set `GOOGLE_API_KEY` environment variable
-4. **Ollama (Local)**: Run `ollama serve` and ensure a model is pulled
-5. **LM Studio (Local)**: Start LM Studio server on port 1234
+1. **Claude (Anthropic)**: Set `ANTHROPIC_API_KEY`
+2. **OpenAI/ChatGPT**: Set `OPENAI_API_KEY`
+3. **OpenRouter (multi-model)**: Set `OPENROUTER_API_KEY`
+4. **Google Gemini**: Set `GEMINI_API_KEY`
+5. **Together AI**: Set `TOGETHER_API_KEY`
+6. **Fireworks AI**: Set `FIREWORKS_API_KEY`
+7. **Ollama (Local)**: Run `ollama serve` and ensure a model is pulled
+8. **LM Studio (Local)**: Start LM Studio server on port 1234
 
 **Current status:**
 {chr(10).join(f"- {d}" for d in error_details) if error_details else "- Unknown configuration issue"}

backend/api/v1/settings.py

@@ -538,11 +538,11 @@ CLOUD_MODELS = {
         {"model_id": "claude-haiku-4-20250514", "display_name": "Claude Haiku 4", "context_length": 200000},
     ],
     "openai": [
-        {"model_id": "gpt-4-turbo-preview", "display_name": "GPT-4 Turbo", "context_length": 128000},
         {"model_id": "gpt-4o", "display_name": "GPT-4o", "context_length": 128000},
         {"model_id": "gpt-4o-mini", "display_name": "GPT-4o Mini", "context_length": 128000},
-        {"model_id": "o1-preview", "display_name": "O1 Preview", "context_length": 128000},
-        {"model_id": "o1-mini", "display_name": "O1 Mini", "context_length": 128000},
+        {"model_id": "gpt-4.1", "display_name": "GPT-4.1", "context_length": 1047576},
+        {"model_id": "gpt-4.1-mini", "display_name": "GPT-4.1 Mini", "context_length": 1047576},
+        {"model_id": "o3-mini", "display_name": "O3 Mini", "context_length": 200000},
     ],
     "gemini": [
         {"model_id": "gemini-pro", "display_name": "Gemini Pro", "context_length": 30720},

backend/core/autonomous_agent.py

@@ -421,7 +421,7 @@ class LLMClient:
             try:
                 self.client = openai.OpenAI(api_key=self.openai_key)
                 self.provider = "openai"
-                self.model_name = self.configured_model or "gpt-4-turbo-preview"
+                self.model_name = self.configured_model or "gpt-4o"
                 print(f"[LLM] OpenAI API initialized (model: {self.model_name})")
                 return
             except Exception as e:
@@ -514,8 +514,10 @@ class LLMClient:
         errors = []
         if not ANTHROPIC_AVAILABLE and not OPENAI_AVAILABLE:
             errors.append("LLM libraries not installed (run: pip install anthropic openai)")
-        if not self.anthropic_key and not self.openai_key and not self.google_key:
-            errors.append("No API keys configured")
+        all_keys = [self.anthropic_key, self.openai_key, self.google_key,
+                     self.openrouter_key, self.together_key, self.fireworks_key, self.codex_key]
+        if not any(all_keys):
+            errors.append("No API keys configured (set ANTHROPIC_API_KEY, OPENAI_API_KEY, OPENROUTER_API_KEY, GEMINI_API_KEY, TOGETHER_API_KEY, or FIREWORKS_API_KEY)")
         if not self._check_ollama():
             errors.append("Ollama not running locally")
         if not self._check_lmstudio():