StepFun
Shanghai lab behind the Step series of language and multimodal models.
10
Models catalogued
10
Open weights
2025
First release
Sep 20, 2026
Latest release
Releases per year
Models in this catalog by release year
All releases
Filter in catalog →| Model | Released | Type | Params | Context | Input $/M | Output $/M | Weights |
|---|---|---|---|---|---|---|---|
| Step 5 Preview Preview | Sep 20, 2026 | MultimodalMoE | 600B27B active | 1M | $1.00 | $2.70 | Open weights |
| Step 3.7 Flash | May 29, 2026 | MultimodalMoE | 198B11B active | 262K | $0.20 | $1.15 | Open weights |
| Step 3.5 Flash | Feb 2, 2026 | Text LLMMoE | 196B11B active | 262K | $0.10 | $0.30 | Open weights |
| STEP3-VL-10B | Jan 14, 2026 | MultimodalDense | 10B | - | - | - | Open weights |
| Step-Audio-R1 | Nov 27, 2025 | Multimodal | - | - | - | - | Open weights |
| Step-Audio 2 mini | Aug 29, 2025 | Multimodal | 8B | - | - | - | Open weights |
| NextStep-1-Large | Aug 14, 2025 | Image gen | 14B | - | - | - | Open weights |
| Step3 Deprecated | Jul 31, 2025 | MultimodalMoE | 321B38B active | 65.5K | - | - | Open weights |
| Step-Video-T2V | Feb 17, 2025 | Video gen | 30B | - | - | - | Open weights |
| Step-Audio-Chat | Feb 17, 2025 | Multimodal | 130B | - | - | - | Open weights |