Step is Stepfun’s language model family from Shanghai. Step-1 and Step-2 compete at the open frontier in Chinese and English, with Step-Audio variants for speech.
See all models from StepfunModels in family
2
Open weight
0
API only
2
Avg score
56.4
Top benchmark
75.2
Arena Score
Total HF downloads
—
Primary modality
Text
Context window
16K
First release
Nov 2024
Latest release
May 2025
Every release in the Step family, ranked by composite score across benchmarks, popularity, efficiency, and versatility.
| # | Model | Modality | Score | Params | Released |
|---|---|---|---|---|---|
| 1 | text | BB57.6 | — | May 2025 | |
| 2 | text | BB55.2 | — | Nov 2024 |
When each release shipped, newest first. Useful for tracking version cadence.
May 31
Nov 30
Composite grades across this family. Higher is better, blending benchmarks, popularity, and efficiency.
Closed-source releases accessed through Stepfun’s API.
| # | Model | Modality | Score | Params | Released |
|---|---|---|---|---|---|
| 1 | text | BB57.6 | — | May 2025 | |
| 2 | text | BB55.2 | — | Nov 2024 |
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See every model from a lab side by side, with aggregate stats. Useful when you want a cross-family view of one provider.