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 tokens context length, with no open-source license.
Data sourced primarily from official releases (GitHub, Hugging Face, papers), then benchmark leaderboards, then third-party evaluators. Learn about our data methodology
| Modality | Input | Output |
|---|---|---|
| Text | $0.20 | $0.50 |
| Modality | Input cache | Output cache |
|---|---|---|
| Text | $0.05 | -- |
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.
Grok 4.1 Fast is an AI model published by xAI, released on 2025-11-19, for Reasoning model, and 2M tokens context length, with no open-source license.
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