Grok 4.1 Fast
Grok 4.1 Fast is an AI model published by xAI, released on 2025-11-19, for Reasoning model, and 2M context length, under the 不开源 license, with a 94.74 score on τ²-Bench - Telecom.
Data sourced primarily from official releases (GitHub, Hugging Face, papers), then benchmark leaderboards, then third-party evaluators. Learn about our data methodology
Model basics
Open source & experience
Official resources
API details
| Type | Condition | Input | Output |
|---|---|---|---|
| Text | - | $0.200/ 1M | $0.500/ 1M |
| Type | TTL | Write | Read |
|---|---|---|---|
| Text | - | - | $0.050/ 1M |
Benchmark Results
Grok 4.1 Fast currently shows benchmark results led by MMLU Pro (25 / 126, score 85), LiveCodeBench (25 / 120, score 82), τ²-Bench (10 / 40, score 82.71). This page also consolidates core specs, context limits, and API pricing so you can evaluate the model from benchmark results and deployment constraints together.
General Knowledge
5 evaluationsAgent Level Benchmark
2 evaluationsClaw-style Agent Evaluation
2 evaluationsCompare with other models
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Publisher
Model Overview
Grok 4.1 Fast is an AI model published by xAI, released on 2025-11-19, for Reasoning model, and 2M context length, under the 不开源 license, with a 94.74 score on τ²-Bench - Telecom.
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