@superdavey That would’ve been an error message from OpenAI. I got it too when I tested it with a HEIC file. When you’re passing it an actual file, the base64 gets wrapped up in a data URL so the Vision API doesn’t see it any differently than an image URL. Although when I give it an image URL on the web that ends with .heic, it works fine. So 🤷‍♂️