Verdict
Grok 4 Fast is behind the leaders: #200 of 406 by SIscope score. Strongest at following instructions, weaker at coding.
SIscope score
47
#200 of 406
Human-vote rank
#157
of 419 · score 1400
Price per 1M tokens, blended
No price yet
Not listed on OpenRouter
Context window
No data yet
Speed: coming soon
Shape
Each spoke is a category, 0 at the centre, 100 at the edge.
Category scores
Percentiles: 90 means better than about 90% of tested models.
What goes into each category · Compare with DeepSeek V4.1 Flash
Human-vote score over time
Text arena, recent updates.
Coding votes over time
WebDev arena, recent updates.
Independent test runs
Run by Epoch AI on the same harness for every model. Bars show the share of questions answered correctly.
No Epoch AI runs for this model yet.
Human-vote arenas
People compare two anonymous answers and pick the better one. Scores work like chess ratings.
| Arena | Rank | Score | Range (95%) | Votes | Updated |
|---|---|---|---|---|---|
| Text arena Everyday chat, blind human votes | #157 of 419 | 1400 | 1395–1405 | 18,270 | Oct 28, 2026 |
| WebDev arena Building web apps, blind human votes | #151 of 152 | 1159 | 1132–1187 | 742 | Oct 28, 2026 |
| Vision arena Questions about images, blind human votes | Not on this board yet | ||||
| Agent arena Real multi-step agent sessions | Not on this board yet | ||||
Source: Arena (formerly LMArena) leaderboard dataset, CC BY 4.0. Fetched Nov 4, 2026.
Price
No public list price yet. We only show prices from the OpenRouter models API, and this model isn't listed there under a matching name.