# o1-pro vs Step 3.7 Flash

> Step 3.7 Flash is the stronger model overall, scoring 37.3 to 31.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/o1-pro-vs-step-3-7-flash
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- Step 3.7 Flash is cheaper at $0.18 / $1.11 per million input/output tokens, against $150 / $600 for o1-pro.
- Step 3.7 Flash accepts more context: 256K tokens versus 200K.
- Step 3.7 Flash has downloadable open weights; the other is API-only.

## Snapshot

| | o1-pro | Step 3.7 Flash |
|---|---|---|
| Provider | OpenAI | StepFun |
| Noometry Index | 31.5 | 37.3 |
| Rank | 271 | 207 |
| Context | 200K | 256K |
| Input $/M | $150 | $0.18 |
| Output $/M | $600 | $1.11 |
| Weights | Proprietary | Open |

## Coding

- o1-pro: —
- Step 3.7 Flash: 40.0 (#150)

| Benchmark | o1-pro | Step 3.7 Flash |
|---|---|---|
| SciCode | — | 40% |
| ALE-Bench | — | 694.12 |

## Reasoning

- o1-pro: 20.4 (#239)
- Step 3.7 Flash: 21.6 (#219)

| Benchmark | o1-pro | Step 3.7 Flash |
|---|---|---|
| NYT Connections (extended) | — | 39.7% |
| ARC-AGI-1 | 23.3% | — |
| CritPt | — | 2.3% |
| EnigmaEval | 6.1% | — |

## Math

- o1-pro: —
- Step 3.7 Flash: 42.9 (#82)

| Benchmark | o1-pro | Step 3.7 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | — | 68.5% |

## Knowledge

- o1-pro: 29.7 (#234)
- Step 3.7 Flash: —

| Benchmark | o1-pro | Step 3.7 Flash |
|---|---|---|
| Humanity's Last Exam | 8.1% | — |

## FAQ

### Is o1-pro better than Step 3.7 Flash?

Step 3.7 Flash is the stronger model overall, scoring 37.3 to 31.5 on the Noometry Index.

### Which is cheaper, o1-pro or Step 3.7 Flash?

Step 3.7 Flash is cheaper. It lists at $0.18 per million input tokens and $1.11 per million output tokens; o1-pro lists at $150 and $600.

### Which has the bigger context window?

Step 3.7 Flash does, with 256K tokens against 200K.

### How many benchmarks do o1-pro and Step 3.7 Flash share?

0 benchmarks have published results for both models. o1-pro has 3 scored results on Noometry and Step 3.7 Flash has 5.