Grok 4 Fast (Non-reasoning): benchmark results
Grok 4 Fast evaluated with reasoning disabled. Provider: xAI. Released 2025-09-19. Access: API.
Unified ELO 1522 ± 1, rank #745 of 1761 rated models, from 75 benchmark results.
Strongest benchmark results
| Benchmark | Score | Metric | Percentile |
|---|---|---|---|
| UGI - Writing | 43.04 | Writing Score | 82.3 |
| UGI Leaderboard | 45.76 | UGI Score | 82 |
| UGI - Natural Intelligence | 33.1 | NatInt Score | 79.1 |
| SpeechMap Compliance | 78.2 | % Requests Completed | 75.6 |
| AA Omniscience - Software Engineering (SWE) - Swift | 40 | Accuracy (%) | 70.1 |
| AA Omniscience - Software Engineering (SWE) - R | 12 | Accuracy (%) | 62.1 |
| AI Chess Leaderboard (Reasoning) | 754 | Elo | 60.8 |
| AA Omniscience - Software Engineering (SWE) - Dart | 20 | Accuracy (%) | 59.4 |
| AA TAU-2 Bench | 63.74 | Accuracy (%) | 58.7 |
| Enkokilish Bench | 1.35 | Riddles Solved (%) | 58.3 |
| AA Omniscience - Software Engineering (SWE) - Java | 16 | Accuracy (%) | 57 |
| AA Omniscience - Software Engineering (SWE) - C | 34 | Accuracy (%) | 56.5 |
Interactive version: theaggregate.ai/model?slug=grok-4-fast-non-reasoning · How It Works · Data refreshed daily, snapshot 2026-09-05.