-->
              <optgroup label="OpenAI">
                <option value="openai/gpt-5.4-mini">GPT-5.4 Mini</option>
                <option value="openai/gpt-4o">GPT-4o</option>
                <option value="openai/o3">o3</option>
                <option value="openai/o4-mini">o4-mini</option>
              </optgroup>
              <optgroup label="Anthropic">
                <option value="anthropic/claude-sonnet-4.6">Claude Sonnet 4.6</option>
                <option value="anthropic/claude-sonnet-4-5">Claude Sonnet 4.5</option>
                <option value="anthropic/claude-haiku-3-5">Claude Haiku 3.5</option>
              </optgroup>
              <optgroup label="Other">
                <option value="google/gemini-3.1-pro-preview">Gemini 3.1 Pro Preview</option>
                <option value="google/gemini-3-flash-preview">Gemini 3 Flash Preview</option>
                <option value="deepseek/deepseek-v4-flash">DeepSeek V4 Flash</option>
                <option value="deepseek/deepseek-v4-pro">DeepSeek V4 Pro</option>
                <option value="deepseek/deepseek-chat-v3-0324">DeepSeek V3 (legacy)</option>
                <option value="meta-llama/llama-4-scout">Llama 4 Scout</option>
              </optgroup>
            </select>
            </div>