OpenAI's next image model GPT-Image-2.6 spotted in API docs, rollout imminent

mark_k · x · 2026-10-29

Leaker markk spotted "GPT-Image-2.6" in OpenAI's API documentation: the markup parameter docs state "Supports GPT Image 2.5 and 2.6." The parameter overlays a transparent PNG on the first image (via fileid, HTTPS URL, or base64), must match the image's dimensions, and cannot be combined with a mask.

The mention suggests GPT-Image-2.6 is already in internal docs and should roll out soon.

Related event: GPT-Image-2.6 surfaces in OpenAI docs ahead of launch(2 posts)→

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