Provider analysis
StepFun
Chinese AI lab publishing open-weight models including Step-3.5-Flash (199B), Step3-VL vision-language models, and Step-Audio models.
This provider page blends full-profile entries with broader verified listings. Use it to separate deeply evaluated flagship models from source-backed records that are tracked primarily for market visibility, access data, and freshness coverage.
Tracked models available through provider-managed APIs.
Models with downloadable weights or self-hosted distribution paths.
Total source references attached across this provider catalog.
StepFun
Step-3.5-Flash
Step
StepFun's 199B parameter Step-3.5-Flash for text generation and reasoning. 91.9K downloads on HuggingFace. Available in BF16, FP8, and GGUF quantizations.
- Context
- 131,072
- Input
- Not applicable
- Output
- Not applicable
- Coverage
- Full profile
StepFun
Step3-VL-10B
Step
StepFun's 10B Step3-VL vision-language model with 211K downloads on HuggingFace. Supports FP8 quantization.
- Context
- 131,072
- Input
- Not applicable
- Output
- Not applicable
- Coverage
- Full profile
StepFun
Step-Audio-R1.1
Step
StepFun's 33B Step-Audio-R1.1 for audio-text-to-text generation and understanding.
- Context
- 131,072
- Input
- Not applicable
- Output
- Not applicable
- Coverage
- Full profile
StepFun
NextStep-1.1
Step
StepFun's 15B NextStep-1.1 for text-to-image generation. Supports image editing and modification based on text prompts.
- Context
- 512
- Input
- Not applicable
- Output
- Not applicable
- Coverage
- Full profile