Models / xai / Grok 3 Fast Beta

Grok 3 Fast Beta

JSON →
llm

A faster, optimized beta version of Grok 3 from xAI designed for lower latency responses.

texttool-usejson-modestreamingreasoningcode-generationfunction-callingprompt-caching
homepage ↗docs ↗
Specs
Context & limits
131K
context window
131K
max output
Lifecycle
Dates
released2025-01-20
knowledge cutoff2025-01-01
Resources
homepagehttps://x.ai/blog/grok-3-fast-beta ↗
docshttps://docs.x.ai/docs/grok-3-fast-beta ↗