Backport: fix(bfl): use 'image' field instead of 'input_image' for fill pro model#15530
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…el (#15525) ## Background reported in #14351 when using the model id `flux-pro-1.0-fill`, the BFL api expects the the field `image` instead of `input_image` this is also logged in their docs in the request sent [here](https://docs.bfl.ml/flux_tools/flux_1_fill#create-a-request) ## Summary change just that field for the mode id `flux-pro-1.0-fill` based on a conditional check ## Manual Verification verified by running the repro: <details> <summary>repro </summary> ```ts import { blackForestLabs, type BlackForestLabsImageModelOptions, } from '@ai-sdk/black-forest-labs'; import { generateImage } from 'ai'; import sharp from 'sharp'; import { run } from '../../lib/run'; import { presentImages } from '../../lib/present-image'; run(async () => { const image = await sharp({ create: { width: 256, height: 256, channels: 3, background: { r: 120, g: 180, b: 255 }, }, }) .png() .toBuffer(); const mask = await sharp({ create: { width: 256, height: 256, channels: 3, background: { r: 255, g: 255, b: 255 }, }, }) .png() .toBuffer(); console.log( 'Running BFL fill inpainting with a 256x256 input image and mask.', ); const result = await generateImage({ model: blackForestLabs.image('flux-pro-1.0-fill'), prompt: { text: 'Replace the masked area with a red square.', images: [image], mask, }, aspectRatio: '1:1', providerOptions: { blackForestLabs: { outputFormat: 'png', steps: 25, guidance: 7.5, } satisfies BlackForestLabsImageModelOptions, }, }); await presentImages(result.images); }); ``` </details> ## Checklist - [x] All commits are signed (PRs with unsigned commits cannot be merged) - [x] Tests have been added / updated (for bug fixes / features) - [ ] Documentation has been added / updated (for bug fixes / features) - [x] A _patch_ changeset for relevant packages has been added (for bug fixes / features - run `pnpm changeset` in the project root) - [x] I have reviewed this pull request (self-review) ## Related Issues fixes #14351
aayush-kapoor
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May 21, 2026
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This is an automated backport of #15525 to the release-v6.0 branch. FYI @aayush-kapoor