# Grok 4.1 Fast

Grok 4.1 Fast is xAI's best agentic tool calling model that shines in real-world use cases like customer support and deep research. 2M context window.

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-4-1-fast
- **Available at Providers**: 19
- **Release Date**: November 19, 2025

### Benchmark Scores
- Weekly: 3.46

## Providers

| Provider | Name | $ Input (per 1M) | $ Output (per 1M) | Free | Link |
|----------|------|-----------------|------------------|------|------|
| [FastRouter](/llm/fastrouter.txt) | xAI: Grok 4.1 Fast | 0.20 | 0.50 |  | [View](https://fastrouter.ai/models/x-ai/grok-4.1-fast) |
| [xAI](/llm/xai.txt) | Grok 4.1 Fast | 0.20 | 0.50 |  |  |
| [Nano-GPT](/llm/nanogpt.txt) | Grok 4.1 Fast |  |  |  |  |
| [OpenRouter](/llm/openrouter.txt) | Grok 4.1 Fast | 0.20 | 0.50 |  | [View](https://openrouter.ai/x-ai/grok-4.1-fast) |
| [ValorGPT](/llm/valorgpt.txt) | Grok 4.1 Fast |  |  |  | [View](https://www.valorgpt.com/models/x-ai-grok-4.1-fast) |
| [Venice](/llm/venice.txt) | Grok 4.1 Fast | 0.50 | 1.25 |  |  |
| [ZenMUX](/llm/zenmux.txt) | xAI: Grok 4.1 Fast | 0.20 | 0.50 |  |  |
| [JetBrains AI](/llm/jetbrains.txt) | Grok-4.1 Fast |  |  |  | [View](https://www.jetbrains.com/help/ai-assistant/supported-llms.html) |
| [Kilo Code](/llm/kilocode.txt) | xAI: Grok 4.1 Fast | 0.20 | 0.50 |  |  |
| [RedPill](/llm/redpill.txt) | xAI: Grok 4.1 Fast | 0.20 | 0.50 |  |  |
| [RouterLink](/llm/routerlink.txt) | Grok 4.1 Fast |  |  |  |  |
| [Blackbox AI](/llm/blackboxai.txt) | blackboxai/x-ai/grok-4.1-fast |  |  |  |  |
| [Routeway](/llm/routeway.txt) | xAI: Grok 4.1 Fast | 0.19 | 0.48 |  | [View](https://routeway.ai/models) |
| [Qiniu](/llm/qiniuai.txt) | x-AI/Grok-4.1-Fast |  |  |  |  |
| [LangDB](/llm/langdb.txt) | grok-4.1-fast |  |  |  | [View](https://langdb.ai/app/models) |
| [ApiYI](/llm/apiyi.txt) | grok-4-1-fast |  |  |  |  |
| [WaveSpeed AI](/llm/wavespeed.txt) | grok-4.1-fast | 0.22 | 0.55 |  |  |
| [Airforce API](/llm/airforce.txt) | grok-4.1-fast |  |  |  |  |
| [Writingmate](/llm/writingmate.txt) | xAI: Grok 4.1 Fast |  |  |  | [View](https://writingmate.ai/models/x-ai/grok-4.1-fast) |

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