201B multimodal open-weights model from StepFun — underrated in the West. Image+text input, strong reasoning. Successor to Step 3.5 Flash (199B). $0.20/$1.15 per MTok on OpenRouter.
At a glance
Context
262K tokens
Parameters
201B
Input
text, image, code
Specifications
- Status
- Released
- Date
- May 29, 2026
- Lab
- StepFun AI
- Origin
- CN
- Type
- multimodal, reasoning
- Open weights
- Yes
- License
- Apache 2.0
- Context
- 262K tokens
- Parameters
- 201B
- Input
- text, image, code
- Output
- text, code