Summary
Vercel added xAI's Grok 4.3 to AI Gateway on May 7, 2026. The changelog says the model brings a 1M-token context window plus improvements in accuracy, tool calling, and instruction following through Vercel's unified routing and observability layer.
What changed
Vercel AI Gateway added support for xAI's Grok 4.3 model.
Why it matters
Model gateways are competing on how quickly they normalize access to frontier models. Adding Grok 4.3 through AI Gateway strengthens Vercel's position as an orchestration and observability layer that sits above individual model vendors.
Evidence excerpt
Vercel said Grok 4.3 is now available on AI Gateway and highlighted its 1M-token context window and improved tool calling.