Grok 4.1 Fast

xAI llm

Tool-calling-optimised model with a 2M-token context window, launched alongside xAI's Agent Tools API.

overall ⌄

—

nothing published

price · $/M tokens

no published price

to run it yourself ⌄

API only

no weights to run

Benchmarks

What its maker published, and what anyone else measured. Every figure links the document it came from.

No recorded lineage — root or standalone model.