พื้นหลังโปร่งใส GPT-Image-2 — สร้าง PNG มีแอลฟา
OpenAI opened transparent backgrounds in the GPT-Image-2 API preview on 20 Aug 2026. ChatImg exposes it as a toggle.
- What shipped
- GPT-Image-2 alpha PNG preview
- How to turn it on
- ChatImg → GPT Image 2 → Transparent
The API can finally emit a reusable cutout
The 20 Aug 2026 preview lets GPT-Image-2 return a PNG with alpha.
Features
Generate the cutout. Skip the keying step.
ChatGPT could already emit transparent images; the API could not. GPT-Image-2 preview now returns a PNG with alpha. ChatImg turns it on with one toggle.
Real alpha, not a white studio wall
The download is a PNG with an alpha channel. Drop it on Figma, a Unity atlas, or a checkerboard.
Built for production assets
Game sprites, app icons, product SKUs, and web components — the jobs OpenAI named.
One click on the generator
Open ChatImg, pick GPT Image 2, turn on Transparent background.
Where transparent PNGs actually make money
A full-bleed poster does not need alpha. These three jobs do.
Product cutouts
Ecommerce SKUs and ad variants. Generate the object once.
Game sprites & stickers
Isometric potions, characters, UI chrome.
UI and web components
Icons and empty states that inherit the page color.
Three steps
No extra model and no Photoshop keying.
- 1
Open ChatImg on GPT Image 2
Use the deep link so the model and toggle are already on.
- 2
Describe an isolated subject
Name the object, the view, and transparent background.
- 3
Download the PNG
Drop it on a checkerboard. Empty pixels around the subject means you are done.
Who this is for
The three jobs that actually need alpha.
Game & sticker artists
Sprites that composite onto any scene.
Ecommerce teams
One SKU cutout, many campaign backgrounds.
Product designers
UI chrome that inherits the page color.
FAQ
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