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Grok 4.1 Fast is xAI's best agentic tool calling model that shines in real-world use cases like customer support and deep research. 2M context window. Reasoning can be enabled/disabled using...
42.7
Quality Score
1192
Arena ELO
2M
Parameters
2M
Context
Use this section to answer one simple question first: how much outside evidence do we have that this model performs well? Structured benchmark scores appear first, then official provider evidence, then live arena signal.
This model has normalized benchmark rows, so scores here are directly comparable across benchmark sources.
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Nov 2025
Released
These are recent benchmark or leaderboard claims from official provider sources. They are useful for freshness and context, but they are not treated the same as normalized independent benchmark rows.
Grok 4.1 | xAI Docs
Grok 4.1 | xAI Docs Docs Search ⌘ K Get Started Welcome Quickstart Models Pricing Release Notes Build New Getting Started Skills, Plugins, and Marketplaces Modes and Commands Headless and Scripting Text Text Generation Reasoning Structured Outputs Streaming Multi Agent Completions (Legacy) Imagine Overview Image Editing Multi-Image Editing Image Generation Video Generation Image-to-Video Video Editing Reference-to-Video Video Extension Voice New Overview Ephemeral Tokens Voic
View sourceGrok 4 Benchmark Update
Quality: 41.5/100 | Price: $6/M tokens | Output: 42.798 tok/s | MMLU: 0.866% | HumanEval: 0.819%
View sourceGrok 4.1 benchmark update
xAI published official provider-reported benchmark evidence for Grok 4.1.
View source1192
ELO Score
1184 - 1200
95% Confidence
+/-8 points
10.6K
Battles
May 20, 2026
Last Updated