# Grok 4 Fast

Grok 4 Fast is xAI's latest multimodal model with SOTA cost-efficiency and a 2M token context window. It comes in two flavors: non-reasoning and reasoning. Read more about the model on xAI's [news post](http://x.ai/news/grok-4-fast).

Reasoning can be enabled/disabled using the `reasoning` `enabled` parameter in the API. [Learn more in our docs](https://openrouter.ai/docs/use-cases/reasoning-tokens#controlling-reasoning-tokens)

## Model Information

- **Organization**: [xAI](/llm.txt)
- **Slug**: grok-4-fast
- **Available at Providers**: 20
- **Release Date**: August 28, 2025

### Benchmark Scores
- Weekly: 1.03
- AIME 2025: 0.92
- HLE: 0.2
- GPQA: 0.857
- Browsecomp: 0.449

## Providers

| Provider | Name | $ Input (per 1M) | $ Output (per 1M) | Free | Link |
|----------|------|-----------------|------------------|------|------|
| [FastRouter](/llm/fastrouter.txt) | xAI: Grok 4 Fast | 0.20 | 0.50 |  | [View](https://fastrouter.ai/models/x-ai/grok-4-fast) |
| [xAI](/llm/xai.txt) | Grok 4 Fast | 0.20 | 0.50 |  |  |
| [Nano-GPT](/llm/nanogpt.txt) | Grok 4 Fast |  |  |  |  |
| [Nano-GPT](/llm/nanogpt.txt) | Grok 4 Fast Thinking |  |  |  |  |
| [OpenRouter](/llm/openrouter.txt) | Grok 4 Fast | 0.20 | 0.50 |  | [View](https://openrouter.ai/x-ai/grok-4-fast) |
| [Requesty](/llm/requesty.txt) |  | 0.20 | 0.50 |  |  |
| [ValorGPT](/llm/valorgpt.txt) | Grok 4 Fast |  |  |  | [View](https://www.valorgpt.com/models/x-ai-grok-4-fast) |
| [Yupp](/llm/yupp.txt) | Grok 4 Fast (OpenRouter) |  |  |  |  |
| [ZenMUX](/llm/zenmux.txt) | xAI: Grok 4 Fast | 0.20 | 0.50 |  |  |
| [Mammouth AI](/llm/mammouth.txt) | grok-4-fast | 0.20 | 0.50 |  |  |
| [LangDB](/llm/langdb.txt) | grok-4-fast |  |  |  | [View](https://langdb.ai/app/models) |
| [Zed](/llm/zed.txt) | Grok 4 Fast | 0.22 | 0.55 |  | [View](https://zed.dev/docs/ai/models) |
| [Kilo Code](/llm/kilocode.txt) | xAI: Grok 4 Fast | 0.20 | 0.50 |  |  |
| [Blackbox AI](/llm/blackboxai.txt) | blackboxai/x-ai/grok-4-fast |  |  |  |  |
| [Routeway](/llm/routeway.txt) | xAI: Grok 4 Fast | 0.19 | 0.48 |  | [View](https://routeway.ai/models) |
| [Qiniu](/llm/qiniuai.txt) | x-AI/Grok-4-Fast |  |  |  |  |
| [ApiYI](/llm/apiyi.txt) | grok-4-fast |  |  |  |  |
| [WaveSpeed AI](/llm/wavespeed.txt) | grok-4-fast | 0.22 | 0.55 |  |  |
| [MegaNova](/llm/meganova.txt) | Grok-4-Fast | 0.20 | 0.50 |  | [View](https://console.meganova.ai/serverless/x-ai/grok-4-fast) |
| [Writingmate](/llm/writingmate.txt) | xAI: Grok 4 Fast |  |  |  | [View](https://writingmate.ai/models/x-ai/grok-4-fast) |

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