Grok 4 1 Fast specs, prices, where it runs and its benchmark standing

Name: Grok 4 1 Fast
Author: SpaceXAI

closed weights · top 10 on 1 of 4 · released Nov 1, 2025

Provider: SpaceXAI
Release date: Nov 1, 2025; Releases
Parameters: Not disclosed by SpaceXAI
Modalities: Text, Image to Text; Boards
License: Proprietary; LMArena
Hosting: Azure OpenAI (31 regions); Regions
Weights: Closed weights
Announced: Grok 4.1 Fast is available in Enterprise API; Nov 1, 2025 on Releases
Benchmarks: 4 boards captured

Rank	Board	Category	Score	Of
22	Search ArenaAgents and tools · as “Grok 4.1 Fast (Search)”	Agents and tools	1,195	40
82	Vision ArenaVision · as “Grok 4.1 Fast (Reasoning)”	Vision	1,196	85
5	BFCLAgents and tools · stale since 2026-04-12 · as “Grok-4-1-fast-reasoning (FC)”	Agents and tools	69.6%	81
38	MMLU-ProReasoning · stale since 2026-03-11 · as “Grok-4.1-Fast(Reasoning)”	Reasoning	84.2%	100

Versions and release history

2 versions in this line since Sep 19, 2025, from Pricing, OpenRouter and the boards.

Version	Released	Source
Grok 4 1 Fastthis model	Nov 1, 20251 year ago	Releases
Grok 4 Fast	Sep 19, 20251 year ago	Boards

Category ranks, more models and catalog changes