Step 3.5 Flash
| Released | 2026-01-29 |
|---|---|
| Price per 1M | $0.10 in · $0.31 out |
| Overall score | 49.4 (early, few results) |
| Context window | 256,000 tokens |
| Provider | StepFun |
| Weights | Open weights |
Scores
| Dimension | Score | Rank | Benchmarks |
|---|---|---|---|
| Overall: Balanced | 49.4 | 3 | |
| Overall: Coding | 48.7 | 1 | |
| Overall: Reasoning | 50.3 | 2 | |
| Overall: Agentic work | 48.7 | 1 | |
| Reasoning | 48.7 | 1 | |
| Math | 52.3 | 1 | |
| General | 47.5 | 1 | |
| Value vs price | +7.2 |
Evidence
Reasoning 48.7 ±3.6
| Benchmark | Result | Source | Date |
|---|---|---|---|
| Extended NYT Connections | 28.4% | Lech Mazur | 2026-11-10 |
Math 52.3 ±4.2
| Benchmark | Result | Source | Date |
|---|---|---|---|
| MathArena Final-Answer Competitions | 66.8% | MathArena | 2026-11-11 |
General 47.5 ±4.1
| Benchmark | Result | Source | Date |
|---|---|---|---|
| LMArena Text | 1,393 | LMArena | 2026-11-09 |
Names matched to this model
step-3-5-flash