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FORCE_OPENROUTER_GPT5_IMAGE_MINI.md

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🔵 FORCE: OpenRouter GPT-5 Image Mini Implementation

Date: November 4, 2025
Status: ✅ FORCED TO USE OPENROUTER GPT-5 IMAGE MINI

🔵 User Requirement

MUST use: ChatGPT 5 Image Mini via OpenRouter
NOT allowed: OpenAI DALL-E 3 directly

✅ Implementation

Backend (server.js)

Endpoint: https://openrouter.ai/api/v1/chat/completions
Model: openai/gpt-5-image-mini
Parameters:

{
  model: 'openai/gpt-5-image-mini',
  messages: [
    {
      role: 'user',
      content: `Generate an image: ${prompt}. Create a high-quality image with size ${size}.`
    }
  ],
  modalities: ['image', 'text'], // Request both image and text
  image_size: size, // 1024x1024, 1792x1024, 1024x1792
  n: 1
}

Response Handling

Backend tries multiple formats:

  1. Format 1: choices[0].message.images[] (standard OpenRouter image format)
  2. Format 2: message.content[] array with image_url type
  3. Format 3: Extract image URL from message.content string (regex)
  4. Format 4: data[] array (fallback)

⚠️ Important Notes

Model Behavior

  • Model openai/gpt-5-image-mini may return text responses instead of images
  • Parameter modalities: ['image'] may not trigger image generation
  • Response may contain image URL in text content

Error Handling

  • 401 Unauthorized: OpenRouter API key invalid or format incorrect
    • Solution: Use OpenRouter API key (format: sk-or-v1-...)
    • Do NOT use: OpenAI API key directly
  • Text Response: Model returns text instead of image
    • Solution: Backend will extract image URL from text if available

🧪 Testing

Test 1: Image Generation

  1. Open browser: http://localhost:3000
  2. Go to Image tab
  3. Enter prompt: "A beautiful sunset over mountains"
  4. Select aspect ratio: Square (1:1)
  5. Click "Generate Image"
  6. Check Backend Logs:
    • Look for: 🔵 FORCE: Using OpenRouter Chat Completions with GPT-5 Image Mini
    • Look for: 🔵 OpenRouter API Response
    • Check response structure

Test 2: Check Backend Logs

tail -f /tmp/backend.log

Look for:

  • 🔵 FORCE: Using OpenRouter Chat Completions with GPT-5 Image Mini
  • 🔵 Calling OpenRouter API with model: openai/gpt-5-image-mini...
  • 🔵 OpenRouter API Response: {...}

📊 Expected Response Formats

Format 1: Standard Image Response

{
  "choices": [{
    "message": {
      "images": [{
        "image_url": {
          "url": "https://..."
        }
      }]
    }
  }]
}

Format 2: Content Array with Image

{
  "choices": [{
    "message": {
      "content": [
        {
          "type": "image_url",
          "image_url": {
            "url": "https://..."
          }
        }
      ]
    }
  }]
}

Format 3: Text with Image URL

{
  "choices": [{
    "message": {
      "content": "Here is the image: https://example.com/image.jpg"
    }
  }]
}

✅ Status

Backend: ✅ FORCED TO USE OPENROUTER GPT-5 IMAGE MINI
Endpoint: ✅ https://openrouter.ai/api/v1/chat/completions
Model: ✅ openai/gpt-5-image-mini
Response Handling: ✅ MULTI-FORMAT SUPPORT
Error Handling: ✅ ENHANCED
Build: ✅ SUCCESS

🚀 Next Steps

  1. Test with OpenRouter API Key:

    • Use OpenRouter API key (format: sk-or-v1-...)
    • Do NOT use OpenAI API key
    • Check backend logs for response structure

  2. If Model Returns Text:

    • Backend will try to extract image URL from text
    • Check backend logs for actual response format
    • May need to adjust prompt or parameters

  3. If Still Fails:

    • Verify OpenRouter API key is correct
    • Check if model openai/gpt-5-image-mini is available
    • Check backend logs for detailed error

Status: ✅ FORCED TO USE OPENROUTER GPT-5 IMAGE MINI - READY FOR TESTING