OpenAI's gpt-image-2 can now output transparent PNGs from the API
Set background=transparent on generations, edits, or the Responses API for alpha-channel assets — no background removal. Plus a new prompt-caching dashboard.
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Transparent PNGs straight from the API
gpt-image-2 (and gpt-image-2-2026-04-21) now accepts background set to "transparent" and returns PNG or WebP with a real alpha channel. No more routing every generation through a separate background-removal step.
It works in edits and the Responses API too
The flag is live on /images/generations, /images/edits, and /responses — so an agent can produce a clean cutout inline, mid-conversation, without a dedicated image call.
Build this weekend: a one-call asset pipeline
Logos, app icons, stickers, sprite sheets, product cutouts — generate web- and print-ready transparent assets straight from a prompt, skipping Photoshop or rembg entirely.
Also shipped: a prompt-caching dashboard
A new OpenAI dashboard tracks your cache hit rate over time, cache reads per write, and the cache-read/write/uncached token split — filterable by model and service tier, so you can finally see whether caching is actually saving you money.