Sign in
← AI PulseSep 2, 2026

Wire · news · Multi-source brief

Vercel AI SDK Adds Anthropic Fable 5.1 Support, Enhances xAI File Operations, and Expands Tool Calling

The Vercel AI SDK has updated its @ai-sdk/gateway to support Anthropic's Fable 5.1 model and enhanced its @ai-sdk/xai package with new file management capabilities and tool calling support.

By Illumora Editorial

Source · Sep 2, 2026, 3:10 AM · On Illumora · Sep 2, 2026, 3:13 AM

Media from the primary source — shown here so you can stay on Illumora.

Synthesized from multiple allowlisted primaries on the same event. Lanes →

Brief drafted by Illumora’s editorial model from the linked primary source. Ops desk reviews flagged pieces. How we write →

Read the source →Vercel AI SDK Changelog — Release @ai-sdk/gateway@2.0.145 · vercel/ai
Save

Vercel's AI SDK has released updates across several packages, including @ai-sdk/gateway version 2.0.145 and @ai-sdk/xai version 4.0.52. These updates introduce support for new models and expand file handling functionalities.

The @ai-sdk/gateway package now includes support for Fable 5.1, an Anthropic model. Concurrently, the @ai-sdk/xai package has received enhancements to its file interface, enabling more comprehensive file management operations.

Key Points

  • The @ai-sdk/gateway package, version 2.0.145, now supports Anthropic's Fable 5.1 model.
  • The @ai-sdk/xai package, version 4.0.52, implements getFileMetadata, downloadFile (streaming), and deleteFile on the xAI files interface.
  • The xAI files interface now supports expiresAfter upload TTLs, ranging from 3600 to 2592000 seconds.
  • Streaming uploads are supported via { type: 'stream' } data in the xAI files interface.
  • Upload results for xAI file operations now expose byteSize, createdAt, and expiresAt.
  • The @ai-sdk/xai package also threads abortSignal and headers through all file operations.
  • Tool calling support has been added to batch operations in @ai-sdk/google and other related packages.

Context

According to the Vercel AI SDK changelog, the @ai-sdk/gateway update was released on September 2. The @ai-sdk/xai update, which includes file interface enhancements, was released on September 1. Additionally, the changelog indicates that tool calling support has been added to batch operations across several packages, including @ai-sdk/google version 4.0.60 and @ai-sdk/google-vertex version 5.0.72.

Why It Matters

These updates provide developers using the Vercel AI SDK with expanded model access and more robust file management capabilities for xAI services. The addition of tool calling support to batch operations can streamline complex interactions with AI models, potentially improving efficiency for builders.

What To Do

  • Review the Vercel AI SDK documentation for the @ai-sdk/gateway package to understand the integration of Fable 5.1.
  • Examine the @ai-sdk/xai package documentation for details on the new file management functions, including getFileMetadata, downloadFile, and deleteFile.
  • Note the expiresAfter upload TTLs and streaming upload options for xAI file operations.
  • Test the new tool calling support in batch operations if using @ai-sdk/google or other relevant packages.

Keep Exploring

/atlas/claude-family /atlas/**grok**-family