X-Ai/Grok-4-Fast-Reasoning
Fast Grok model for responsive chat, reasoning, and tool-assisted work
xai/grok-4-fast-reasoning- Lab
- xAI
- Family
- grok
- Providers
- 5
- Context
- 2,000,000
- Output limit
- 2,000,000
- Knowledge
- -
- Release
- 2025-12-18
- Updated
- 2025-12-18
- Weights
- Closed
- Input
- Output types
- Capabilities
- tools, reasoning, temperature
Providers
5| 302.AI | xAI | grok-4-fast-reasoning | 2,000,000 | 30,000 | $0.20 / $0.50 | Yes | Yes | - | Yes |
|---|---|---|---|---|---|---|---|---|---|
| Helicone | xAI | grok-4-fast-reasoning | 2,000,000 | 2,000,000 | $0.20 / $0.50 | Yes | Yes | - | Yes |
| Jiekou.AI | xAI | grok-4-fast-reasoning | 2,000,000 | 2,000,000 | $0.18 / $0.45 | Yes | Yes | Yes | Yes |
| Poe | xAI | xai/grok-4-fast-reasoning | 2,000,000 | 128,000 | $0.20 / $0.50 | Yes | Yes | - | No |
| Qiniu | xAI | x-ai/grok-4-fast-reasoning | 2,000,000 | 2,000,000 | - | Yes | Yes | No | Yes |
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