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
57.5
Top benchmark
74.5
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 | Step 1o Turbo (202506)API | text | BB58.3 | — | May 2025 |
| 2 | Step 2 16K Exp (202412)API | text | BB56.7 | — | 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 | Step 1o Turbo (202506)API | text | BB58.3 | — | May 2025 |
| 2 | Step 2 16K Exp (202412)API | text | BB56.7 | — | Nov 2024 |
The Step family is a series of AI models from Stepfun. This page lists every release in the family with its benchmark scores, parameter count, and hardware requirements.
By composite score, Step 1o Turbo (202506) is currently the top model in the family. For local inference, match the parameter count to your VRAM budget. For quality, pick the highest scorer that fits.
See the open-weight section above for models you can run locally. The API-only section lists closed releases that must be accessed through the provider’s API.
Spin up an instance in the cloud, or pick local hardware that fits.
Full Directory
Open the full directory to filter by hardware, capability, license, and benchmark score.
Or Browse by Provider
See every model from a lab side by side, with aggregate stats. Useful when you want a cross-family view of one provider.
