Models / xai / Grok 4 Fast Reasoning

Grok 4 Fast Reasoning

JSON →
llm

A fast inference variant of Grok 4 optimized for reasoning tasks.

textstreamingreasoningcode-generationfunction-callingtool-useprompt-caching
Specs
Context & limits
2M
context window
2M
max output
Lifecycle
Dates

No lifecycle dates recorded.

Resources

No resource links recorded.