Grok 4 Fast
Retired xAI model pair, slugs grok-4-fast-reasoning and grok-4-fast-non-reasoning.
text → text · made by xAI
Sold by 3 ways
| Seller | Lane | Rate |
|---|---|---|
| Microsoft Azure AI cloud | standard | $0.2per Mtok in$0.5per Mtok outraw.githubusercontent.com · read 2026-09-01 |
| Oracle Cloud Infrastructure cloud | standard | $5per Mtok in$25per Mtok outraw.githubusercontent.com · read 2026-10-31 |
| Requesty aggregator | xai | $0.2per Mtok in$0.5per Mtok out$0.05per Mtok cachedrouter.requesty.ai · read 2026-08-28 |
Measured 9 standings
| Place | Board | Metric | Score |
|---|---|---|---|
| 8thof 42 | Fictionlivebench — Epoch AI | 120k token score | 0.75 |
| 10thof 22 | Cybench — Epoch AI | Unguided % Solved | 0.3 |
| 18thof 92 | Forecastbench — Epoch AI | Overall score | 64.9 |
| 22ndof 34 | LMArena · Search | Score (Elo) | 1171 |
| 100thof 173 | Weirdml — Epoch AI | Accuracy | 42.86 |
| 120thof 235 | Dtbench — Epoch AI | Accuracy | 82.67 |
| 135thof 135 | Webdev arena — Epoch AI | Arena Score | 1149 |
| 193rdof 290 | Arc agi 2 — Epoch AI | Score | 5.28 |
| 206thof 309 | Arc agi — Epoch AI | Score | 48.5 |
About
Grok 4 Fast — a text model from xAI, sold by 3 companies from $0.2 in and $0.5 out per million tokens, placed 8th of 42 on Fictionlivebench — Epoch AI.
It takes text and returns text, with a context window of 2,000,000 tokens. It was published in July 2025, trained on material up to 2025. Its sellers say it can reason step by step and call a tool. The catalogue files it under agents. Three companies sell it. The cheapest is $0.2 in and $0.5 out per million tokens at Microsoft Azure AI. Beside the standard rate there is a separately routed lane. It has been measured on 9 boards, and stands best at 8th of 42 on Fictionlivebench — Epoch AI.
Every current figure
- Maker
- xAI
- Register
- model
- Takes
- text
- Returns
- text
- Context
- 2,000,000 tokens
- Published
- July 2025
- Knowledge to
- 2025
- Licence
- not read
- Sellers
- 3
- Maker's own price
- not read
- Price
- $0.2 in and $0.5 out per million tokens — Microsoft Azure AI
- Boards
- 9
- Best place
- 8th of 42 — Fictionlivebench — Epoch AI
Known as 3 names
grok-4-fast-searchGrok4 Fastxai/grok-4-fast