Models · Reasoning
Grok 4.1 Fast Reasoning
by xAI
Fast Grok model for responsive chat, reasoning, and tool-assisted work.
Our verdict
We have not reviewed Grok 4.1 Fast Reasoning yet
No one at Enterprise DNA has checked this listing against its sources. The description comes from public listings gathered automatically. Any fact below shows where it came from and when it was last checked.
From the listing
About Grok 4.1 Fast Reasoning
Fast Grok model for responsive chat, reasoning, and tool-assisted work.
Notes
Grok 4.1 Fast Reasoning is listed in the EDNA Models directory, sourced from models.dev.
Key facts
What we have checked
Not checked yet. Dated facts such as prices, releases and repository activity appear here once we have confirmed them from a source.
API access
How to call it
Call via other with model id `xai/grok-4.1-fast-reasoning`.
- other ·
xai/grok-4.1-fast-reasoning
Sources
Where this comes from
No sources recorded yet. Each source we check is listed here with the date we checked it.
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Changelog
What changed
No changes recorded yet. Releases, price changes and deprecations appear here, with their dates, once we track them for this record.
MODEL FIELD GUIDE / SOURCE EVIDENCE
What you can do with Grok 4.1 Fast Reasoning.
Listed specifications; no EDNA task evaluation has been run. Sources checked 2026-11-07. Hosting routes and app features can differ.
xai/grok-4.1-fast-reasoning- Tool calling
- Listed support
- Structured output
- Not established
- Reasoning controls
- Listed support
- Availability
- available
- Price basis
- token
- Licence verification
- Check the developer licence; the model name is insufficient
- Context length
- Not established
- Knowledge cutoff
- Not established
- Developer release date
- Not established
- First seen in the catalogue
- Not established
- Listed retirement date
- Not established
Inspect the sources and their scope
xai/grok-4.1-fast-reasoning: listed by 2 providers on models.dev (google-vertex, poe); a fact is kept only where the listings agree, so context length, structured output are unknown. Hosting routes can differ.
Checked 2026-11-07Source for reasoning controls, tool calling, input, output.
Checked 2026-11-07FROM SPECIFICATIONS TO YOUR WORK
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Check the source
Price date: 13 Jul 2026, from the models.dev listing. Prices are USD API token rates. Your app subscription, uploads, browsing and tools are separate.
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