Models · Best vision
Grok 4 Fast
by xAI
Fast Grok model for responsive chat, reasoning, and tool-assisted work.
Our verdict
We have not reviewed Grok 4 Fast 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 Fast
Fast Grok model for responsive chat, reasoning, and tool-assisted work.
Notes
Grok 4 Fast is listed in the EDNA Models directory, sourced from models.dev.
Key facts
What we have checked
- Arc agi 2
- 5.3% (for 19 Sept 2025)
- Arc agi
- 48.5% (for 19 Sept 2025)
- Cybench
- 30% (for 19 Sept 2025)
- Dtbench
- 82.7% (for 19 Sept 2025)
- Fiction livebench
- 94.4% (for 19 Sept 2025)
- Weirdml
- 42.9% (for 19 Sept 2025)
Each value shows when we last confirmed it and where it came from. Values we have not confirmed are left out, never guessed.
API access
How to call it
Call via other with model id `xai/grok-4-fast`.
- other ·
xai/grok-4-fast
Scores
How Grok 4 Fast scores
Each score comes from the named source and shows when we last confirmed it. A flag means the score needs care.
| Score | Value | Source | Checked |
|---|---|---|---|
| Arc agi (best-across-versions) | 48.5percentAs of 19 Sept 2025 | Epoch AI (CC BY 4.0) | |
| Arc agi 2 (best-across-versions) | 5.3percentAs of 19 Sept 2025 | Epoch AI (CC BY 4.0) | |
| Cybench (best-across-versions) | 30percentAs of 19 Sept 2025 | Epoch AI (CC BY 4.0) | |
| Dtbench (best-across-versions) | 82.7percentAs of 19 Sept 2025 | Epoch AI (CC BY 4.0) | |
| Fiction livebench (best-across-versions) | 94.4percentAs of 19 Sept 2025 | Epoch AI (CC BY 4.0) | |
| Weirdml (best-across-versions) | 42.9percentAs of 19 Sept 2025 | Epoch AI (CC BY 4.0) |
Compare
Compare Grok 4 Fast side by side
Sources
Where this comes from
- Epoch AI (CC BY 4.0)Third party
- Epoch AI (CC BY 4.0)Third party
- Epoch AI (CC BY 4.0)Third party
- Epoch AI (CC BY 4.0)Third party
- Epoch AI (CC BY 4.0)Third party
- Epoch AI (CC BY 4.0)Third party
A source shows what was published when we checked it. It does not certify security, performance or a working installation. Read our method.
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 Fast.
No longer listed by its catalogue; the facts shown are as last listed. Sources checked 2026-11-07. Hosting routes and app features can differ.
xai/grok-4-fast- Tool calling
- Not established
- Structured output
- Not established
- Reasoning controls
- Not established
- Availability
- unknown
- 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
- Last listed by its catalogue
- 13 Jul 2026
Not in the models.dev catalogue when checked; last listed 2026-07-13. Retirement is not confirmed by a source.
Inspect the sources and their scope
Source for last listed.
Checked 2026-07-13FROM 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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