Grok 4 Fast
Grok 4 Fast is an AI model published by xAI, released on 2025-09-19, for AI model, and 2000K 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 | $0.2 | $0.5 |
| Image | $0.2 | -- |
Grok 4 Fast currently shows benchmark results led by SimpleQA (3 / 45, score 95), GPQA Diamond (41 / 175, score 85.70), LiveCodeBench (28 / 118, score 80). This page also consolidates core specs, context limits, and API pricing so you can evaluate the model from benchmark results and deployment constraints together.
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Grok 4 Fast is an AI model published by xAI, released on 2025-09-19, for AI model, and 2000K tokens context length, with no open-source license.
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