# AI SDK 6.0.248

- Product: AI SDK (https://whatsnew.fyi/product/ai-sdk)
- Vendor: Vercel
- Date: 2026-08-11
- Version: 6.0.248
- Original notes: https://github.com/vercel/ai/releases/tag/ai%406.0.248
- Permalink: https://whatsnew.fyi/product/ai-sdk/releases/6.0.248

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- **added** — Allow `aspectRatio: 'adaptive'` on `generateVideo` for video models that derive output ratio from input

###### Patch Changes

- 2171d15: feat(video): allow `aspectRatio: 'adaptive'` on `generateVideo`

  Some video models derive the output ratio from the input and reject explicit
  `{width}:{height}` values — BytePlus Seedance 2.5 does this for first-frame,
  first-and-last-frame, editing, and extension tasks. `aspectRatio` on
  `VideoModelV3CallOptions`, and
  `experimental_generateVideo` is now `` `${number}:${number}` | 'adaptive' ``, so
  those calls no longer need a type assertion. Support is provider-specific.

- Updated dependencies [2171d15]
  - @ai-sdk/provider@3.0.15
  - @ai-sdk/gateway@3.0.168
  - @ai-sdk/provider-utils@4.0.44