Grok 4.1 Fast Reasoning
grok-4.1-fast-reasoning
Multimodal
2 gateways
1.18x price spread
Where you can run it
| Gateway | Its id | Context | Max output | Input / Mtok | Output / Mtok |
|---|---|---|---|---|---|
| Cheaper Inference Cheapest input | grok-4.1-fast-reasoning |
1M | 1M | $0.170 | $0.425 |
| LLM Gateway | grok-4-1-fast-reasoning |
128K | — | $0.200 | $0.500 |
Prices are US dollars per million tokens, as published in each gateway's own catalog at the last crawl. A dash means that gateway publishes no value — not that it is free. Rows differ because gateways set their own markup, and some let you bring your own provider key.
- Canonical id
grok-4.1-fast-reasoning- Vendor
- xAI
- Type
- Multimodal
- Gateways serving it
- Cheaper InferenceLLM Gateway
- Largest context window
- 1M tokens
- Input price range
- $0.170 – $0.200 / Mtok
- Price spread
- 1.18x between cheapest and dearest gateway
- Accepts
- Text, Image
- Returns
- Text
- Cataloged since
History
What changed for Grok 4.1 Fast Reasoning
Recorded by the daily catalog crawl — when gateways picked this model up, dropped it, or repriced it.
- Cheaper Inference raised input 3.7% to $0.170 and output 3.7% to $0.425 on grok-4.1-fast-reasoning
- Cheaper Inference raised input 26.2% to $0.164 and output 26.2% to $0.410 on grok-4.1-fast-reasoning
- Cheaper Inference cut input 21.8% to $0.130 and output 21.8% to $0.325 on grok-4.1-fast-reasoning
- LLM Gateway lowered Grok 4.1 Fast Reasoning's context window from 2M to 128K