Grok 4 Fast is an AI model published by xAI, released on 2025-09-19, for Chat model, and 2000K context length, with a 95.00 score on SimpleQA.
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 |
Benchmark Results
Grok 4 Fast currently shows benchmark results led by SimpleQA (3 / 47, score 95), LiveCodeBench (30 / 123, score 80), GPQA Diamond (49 / 188, score 85.70). 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
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Publisher
Model Overview
Grok 4 Fast is an AI model published by xAI, released on 2025-09-19, for Chat model, and 2000K context length, with a 95.00 score on SimpleQA.
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