Grok 4.1 Fast
xAI's fast agentic tool-calling model with a 2M context window; non-reasoning variant for low-latency responses
Context
2,000,000
Max output
2,000,000
Input / 1M
$0.20
Output / 1M
$0.50
Providers
3
01Profile
Profile
Released
2025-11-19
Last updated
2025-11-20
Knowledge cutoff
—
Weights
Closed
02Capabilities
Capabilities
Input
text · image
Output
text
Reasoning
No
Tool calling
Yes
Structured output
Yes
Attachments
Yes
Cache read
—
Cache write
—
03Pricing
Pricing across 2 providers
Per 1M tokens, USD. Sorted by input price. First-party row highlighted.
04History
Change history
12+ recent events since 2025-11-19
2026-08-10DeprecatedzenmuxStatus—→ deprecated
2026-08-06Addedofoxoffering→ new
2026-06-03Removednano-gptofferingremoved→ new
2026-05-16Removedkiloofferingremoved→ new
2026-05-16Removedllmgatewayofferingremoved→ new
2026-05-16Removedopenrouterofferingremoved→ new
2026-05-16Removedxaiofferingremoved→ new
2026-04-17Price upllmgatewayinput / 1M$0.20→ new
2026-04-17Price upllmgatewayoutput / 1M$0.50→ new
2026-04-17ContextllmgatewayContext window2,000,000→ new
2026-04-17ContextllmgatewayMax output30,000→ new
2026-03-23Addedllmgatewayoffering→ new