Step 3.5 Flash 2603: benchmark results
Provider: StepFun. Released 2026-03-01. Access: API.
Unified ELO 1597 ± 1, rank #298 of 1553 rated models, from 20 benchmark results.
Strongest benchmark results
| Benchmark | Score | Metric | Percentile |
|---|---|---|---|
| AA TAU-2 Bench | 87.43 | Accuracy (%) | 81.4 |
| AA IFBench | 66.53 | Accuracy (%) | 79 |
| AA Terminal-Bench Hard | 32.58 | Accuracy (%) | 76.6 |
| AA Humanity's Last Exam | 24.47 | Accuracy (%) | 76.2 |
| AA GPQA Diamond | 82.63 | Accuracy (%) | 71.2 |
| AA CritPt | 2.29 | Accuracy (%) | 70.9 |
| AA Omniscience - Science, Engineering & Mathematics | 34.37 | Accuracy (%) | 68.1 |
| Artificial Analysis Intelligence Index | 16.96 | Intelligence Index | 65.8 |
| AA Omniscience - Business | 20.56 | Accuracy (%) | 63.7 |
| AA Omniscience - Humanities & Social Sciences | 24.8 | Accuracy (%) | 62.5 |
| AA Omniscience - Law | 15.92 | Accuracy (%) | 62.4 |
| AA-Omniscience Accuracy | 24.62 | Accuracy (%) | 62.2 |
Interactive version: theaggregate.ai/model?slug=step-3-5-flash-2603 · How It Works · Data refreshed daily, snapshot 2026-09-08.