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v0.43.1 — gemini image input is not supported (422)
Signed-out Gemini accepts an image upload and then refuses to answer about it — PERMISSION_DENIED from its own generate call — so the API now returns 422 immediately instead of charging ~100 s and a browser render for a request that cannot succeed.
The image_url parameter stays on gemini.ask (removing it would break callers); only the documentation changes, and it now points at chatgpt.ask, which does answer about a picture.
Note the v0.43.0 release notes said "image input on chatgpt and gemini ask" — that was correct for ChatGPT and wrong for Gemini. ChatGPT image input is verified working.