Invalid file 'image': unsupported mimetype ('application/octet-stream'). Supported file formats are 'image/png'.

[ChiefGnome]

Confirm this is a Node library issue and not an underlying OpenAI API issue

• This is an issue with the Node library

Describe the bug

Since yesterday, a call to the "openai.images.edit" API throws an error:
BadRequestError: 400 Invalid file 'image': unsupported mimetype ('application/octet-stream'). Supported file formats are 'image/png'.
The same API call worked for that last year without this error.

To Reproduce

• Provide to images, and set the filenames to patchFn and maskFn, both files are PNGs.
• Call the openai.images.edit API with the following code

Code snippets

const response = await openai.images.edit({
        image: fs.createReadStream(patchFn),
        prompt,
        mask: fs.createReadStream(maskFn),
        n: 1,
        size: "1024x1024",
        response_format: "b64_json",
    }
);

OS

macOS 15.4

Node version

Node v22.14.0

Library version

openai 4.95.0

[aaronkopplin]

getting the same error

[SlicoHP]

Same error here with:

Node version
v20.9.0

Openai
4.93.0

[vemiliogp]

Getting the same error

[iMcreAtive]

Same error:
Node: v20.18.1
Openai: 4.95.1

[akinoavx13]

Hi,
Is there a fix available for this issue?
Thanks!

[jt55401]

same issue
node: v23.9.0
openai: 4.95.1

[kennethhutw]

Hi,
same issue
Is there a fix available for this issue? or sample code
Thanks!

[joeydotdev]

Seeing this across both go + node.js clients. Seems like a regression on OpenAI's side

[akinncar]

same issue

[devPablo]

Having the same issue on my end.
"openai": "^4.96.0"

[taufiq-husain]

Getting the same issue with this:

"engines": {
    "node": "22"
  },
"openai": "^4.96.0",

Might have to resort to CURL requests for now.

[dested]

Same error.

[kgmodi]

I am facing the same issue.