Hey, thanks for the report. This isn’t exactly a bug, it’s a current limitation. The image generation tool doesn’t accept size or dimension params in the prompt right now. The output resolution is set by the model provider’s default, which is currently 1536×1024, so requests like “200x200px” or “750x1500” get ignored no matter how you phrase them.
We’re already tracking support for custom sizes and aspect ratio as a request, but there’s no timeline yet. If there’s an update, I’ll follow up.
There’s also an existing thread about this, you can subscribe to it to stay updated: Image Generation Only Has Fixed Resolution