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Vercel AI SDK Updates OpenAI Support and Assistant History Serialization

The Vercel AI SDK has been updated to include support for the gpt-6-astra model and to implement strict assistant history serialization without synthetic item IDs.

By Illumora Editorial

Source · Sep 4, 2026, 9:39 PM · On Illumora · Sep 4, 2026, 9:43 PM

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Read the source →Vercel AI SDK Changelog — Release @ai-sdk/open-responses@1.0.40 · vercel/ai
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The Vercel AI SDK has received updates across its components. The @ai-sdk/openai package, in version 3.0.108, now supports the gpt-6-astra model. Concurrently, the @ai-sdk/open-responses package, in version 1.0.40, introduces strict assistant history serialization.

Key Points

  • The @ai-sdk/openai package version 3.0.108 adds support for the gpt-6-astra model.
  • The @ai-sdk/open-responses package version 1.0.40 includes a feature for strict assistant history serialization.
  • This serialization is implemented without the use of synthetic item IDs.
  • Both updates were released on September 4 by github-actions.

Context

According to the Vercel AI SDK changelog, these updates are part of ongoing patch changes to the SDK. The changes were committed and signed with GitHub’s verified signature.

Why It Matters

These updates provide developers using the Vercel AI SDK with access to a new OpenAI model and introduce a change to how assistant history is managed, which could affect data handling and consistency in applications.

What To Do

  • Developers should review the @ai-sdk/openai documentation for details on integrating the gpt-6-astra model.
  • Examine the implications of strict assistant history serialization in @ai-sdk/open-responses for existing applications.
  • Update to @ai-sdk/openai@3.0.108 and @ai-sdk/open-responses@1.0.40 to access these features.

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