I’m testing the new gpt-image-1 API to swap my haircut. Workflow: Send my photo, a hair-only mask, and tell the image gen to change my hairstyle. Tried first from a Swift app, then with the official Python example. Problem: the model keeps regenerating the entire photo instead of just the hair, …

Hey everyone, Sorry for the delay in updates here. Confirming that gpt-image-1 doesn’t yet support precise inpainting, so mask edits can affect nearby areas or sometimes regenerate most of the image. The model currently treats masks in 16×16 blocks, so results won’t match Photoshop-style precision. …

[image] datPascal: Keep us updated. Would love to see a working example! :slight_smile: Yeah, I hope to have time later tonight. I’ve passed on to OpenAI in the meantime. Thanks for reporting.

Hi OpenAI engineer here, is there a request id you can share?

Here’s why the model regenerates the entire image: Even with a proper mask, the model requires a clear prompt and clean input separation between what should change and what must remain untouched. Also, the image should be passed once, not as a list. [file_0000000069fc6246b0e01636ebf60b22] [file-…

I have just changed the prompt image so that it is not in a list. I also changed the prompt to be even clearer. The result stays the same. The entire image is re-rendered exactly as in your example. Here is a example Output: [result] i thought the model would only adjust the marked area. At …

the image api doesnt give me back much. I hope this is the right thing here? result.created: 1745518205

This is mine: [polepole-1] [polepole-2] [polepole-3]

So frustrating, we’ve been testing this for the past 24 hours, trying everything we can, but yes, mask is considered ‘soft’ mask, not ‘hard’ mask so the model is literally making up things and changing the pixels that should not be touched… We are reverting to another api we used that was doing a m…

I think its definitely a soft mask, as in the images openai has put in the guide here ( https://platform.openai.com/docs/guides/image-generation?image-generation-model=gpt-image-1&lang=javascript#edit-an-image-using-a-mask-inpainting ) you can clearly see the output is fully rerendered (Look at the w…

it’s a soft mask. hoping it will change in the future - for our application, we can’t edit any of the other pixels.

Curious which service you all would recommend while OpenAI fixes this, for the in painting usecase

Gpt-image-1 problems with mask edits

API Bugs

polepole April 24, 2025, 6:18pm 12

This is mine:

Violation of terms on photos that I own and only want to change smiling

Topic		Replies	Views
Mask is completely ignored in the image edit api Bugs	8	882	August 23, 2025
GPT Image 2 Masking Issue API	2	1407	April 22, 2026
Help with `images.edit` : Mask Not Constraining Edit to Specific Area API edit-endpoint , gpt-image-1	1	486	August 19, 2025
Image editing / inpainting with a mask for gpt-image-1 replaces the entire image Feedback gpt-image-1	4	5161	June 13, 2025
GPT Image API: How can I reliably edit only the masked/selected area while preserving everything else? API api , gpt-image-2	1	124	August 10, 2026

Gpt-image-1 problems with mask edits

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