X-Ai/Grok-4-Fast-Reasoning
by Qiniu · listed Dec 2025RTV
Fast Grok model for responsive chat, reasoning, and tool-assisted work
Current rates USD per 1M tokens
Input—
Output—
Cache read—
Cache write—
Against the market
On the record
- Model id
x-ai/grok-4-fast-reasoning- Context window
- 2M tokens
- Max output
- 2M tokens
- Input modalities
- text, image, audio, video
- Output modalities
- text
- Reasoning
- yes
- Tool calls
- yes
- Open weights
- no
- Knowledge cutoff
- —
- Released
- 2025-12-18
- Last updated
- 2025-12-18
- Provider docs
- developer.qiniu.com/aitokenapi