Transparent backgrounds are now available in preview for gpt-image-2 and gpt-image-2-2026-04-21 in the Images…
OpenAI · developers.openai.com/api/docs/changelog#2026-08-20-2
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Transparent backgrounds are now available in preview for gpt-image-2 and gpt-image-2-2026-04-21 in the Images API and the Responses API image generation tool. Set background to transparent and use png or webp output; jpeg does not support…