UltraGPT
StepFun
Every StepFun model UltraGPT can reach, kept in sync with the live catalog — pricing, context window and capabilities for each one.
2
Models tracked
1
Providers
2
Reasoning models
1
See images (vision)
262K
Largest context window
0
Free to run
All StepFun models.
Search and filter this provider's lineup — pricing per million tokens, context window, modalities, reasoning effort and independent benchmark scores where available.
2 of 2 models
Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token....
Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with a vision encoder for native image and video understanding, activating roughly 11B parameters...
Design Arena — ranked #38 across 8 categories