Model comparison
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.
Last verified . 0 shared benchmarks.
StepFunSummary
- 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.
Side by side
| o1-pro | Step 3.7 Flash | |
|---|---|---|
| Provider | OpenAI | StepFun |
| Noometry Index | 31.5 | 37.3 |
| Released | 2025-03-19 | 2026-05-29 |
| Weights | Proprietary | Open |
| Context window | 200K | 256K |
| Max output | 100K | 256K |
| Input $ / M tokens | $150 | $0.18 |
| Output $ / M tokens | $600 | $1.11 |
| Results tracked | 3 | 5 |
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Category by category
Coding Not comparable
o1-pro: —, Step 3.7 Flash: 40.0 (#150)
Reasoning Step 3.7 Flash leads
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 Not comparable
o1-pro: —, Step 3.7 Flash: 42.9 (#82)
| Benchmark | o1-pro | Step 3.7 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | — | 68.5% |
Knowledge Not comparable
o1-pro: 29.7 (#234), Step 3.7 Flash: —
| Benchmark | o1-pro | Step 3.7 Flash |
|---|---|---|
| Humanity's Last Exam | 8.1% | — |
Frequently asked questions
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.