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← AI PulseAug 12, 2026

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Vercel AI SDK Adds Priority Service Tier and Grok 4.6 Model Support

The Vercel AI SDK's @ai-sdk/xai package, in versions 4.0.38, 4.0.37, 3.0.119, and 2.0.86, has introduced support for a priority service tier on chat and responses, and added Grok 4.6 model IDs.

By Illumora Editorial

Source · Aug 12, 2026, 6:49 PM · On Illumora · Aug 12, 2026, 6:52 PM

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Read the source →Vercel AI SDK Changelog — Release @ai-sdk/xai@4.0.38 · vercel/ai
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The Vercel AI SDK's @ai-sdk/xai package received updates on August 12 that introduced new capabilities. Version 4.0.38 of the package now supports a priority service tier for chat and responses. This follows earlier updates on the same day that added support for Grok 4.6 models.

Key Points

  • The @ai-sdk/xai@4.0.38 release on August 12 added support for a priority service tier on chat and responses.
  • The @ai-sdk/xai@4.0.37 release on August 12 included Grok 4.6 model IDs and support for its xhigh reasoning effort.
  • The @ai-sdk/xai@3.0.119 release on August 12 also added Grok 4.6 model IDs and support for its xhigh reasoning effort.
  • The @ai-sdk/xai@2.0.86 release on August 12 introduced Grok 4.6 models.

Context

According to the Vercel AI SDK changelog, multiple versions of the @ai-sdk/xai package were updated on August 12. These updates focused on expanding model compatibility and introducing new service tiers. The changelog entries indicate a phased rollout of these features across different major versions of the package.

Why It Matters

These updates provide developers using the Vercel AI SDK with access to Grok 4.6 models and a new priority service tier. This can impact the performance and capabilities of applications built with the SDK, potentially offering enhanced reasoning efforts and service reliability for chat and response functionalities.

What To Do

  • Note the specific @ai-sdk/xai package version you are using to confirm feature availability.
  • Review the Vercel AI SDK documentation for details on implementing the priority service tier.
  • Test applications with Grok 4.6 models to evaluate their xhigh reasoning effort.
  • Compare the features across different @ai-sdk/xai versions if considering an upgrade.

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