Grok 4.3 on AI Gateway
Grok 4.3 hits 1M context window. Vercel AI Gateway now routes to xAI's latest—native support for tool calling and instruction following.
Why it matters
Vercel's AI Gateway expands model availability to include xAI's Grok 4.3 with 1M context, giving builders unified API access to frontier reasoning models with built-in observability and cost tracking. This signals continued fragmentation of the model marketplace and the rising importance of abstraction layers.
The key facts
6 to knowGrok 4.3 available via Vercel AI Gateway
1M token context window
Improvements in accuracy, tool calling, instruction following
AI Gateway features: custom reporting, observability, Bring Your Own Key, intelligent provider routing, automatic retries
Model accessible via xai/grok-4.3 in AI SDK
Published April 30, 2026
Go to the source
Vercel Blogvercel.com
Publisher excerpt: Grok 4.3 is now available on . The model has a 1M token context window and improvements in accuracy, tool calling, and instruction following.Vercel AI Gateway To use Grok 4.3, set model to in the .xai/grok-4.3AI SDK AI Gateway provides a unified API for calling models, tracking usage and cost, and…