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, with a 1324.80 score on Creative Writing.
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 |
| Text | - | — | $0.050/ 1M Cache = hit |
“—” means the modality is not billed in that direction, or the vendor has not published a price for it.
Benchmark Results
Grok 4.1 Fast currently shows benchmark results led by MMLU Pro (27 / 134, score 85), LiveCodeBench (28 / 128, score 82), τ²-Bench (10 / 44, 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
4 evaluationsWriting and Creative Capabilities
1 evaluationsAgent Level Benchmark
2 evaluationsClaw-style Agent Evaluation
2 evaluationsPublisher
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, with a 1324.80 score on Creative Writing.
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