Hugging Face model card
Fields: tags, gated, license, summary, base model, library name, pipeline tag
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.…
- Context
- 262K
- Max output
- 66K
- Input
- $0.10
- Output
- $0.30
Recommended use cases
Strengths in this dataset
- 262,144-token context window
- text input
- 9 supported API parameters listed
Limits and caveats
- Provider behavior and pricing can change; verify the linked sources before production use.
Capability
Model-native facts
Model- Reasoning
- Supported
- Open weights
- Supported
Provider endpoint facts
Provider endpoint- Tool calling
- Supported
- Structured output
- Not supported
- Streaming
- Unknown
- Prompt cache
- Unknown
- Batch
- Unknown
- Fine-tuning
- Unknown
Step 3.5 Flash Provider pricing
Provider endpoint: stepfun/step-3.5-flash
- Input
- $0.10 per 1M tokens
- Output
- $0.30 per 1M tokens
- Cached input
- Unknown per 1M tokens
- Image output
- Unknown per 1M tokens
Sources and verification
OpenRouter Models API
Fields: identity, description, modalities, context window, maximum output, pricing, supported parameters
Frequently asked questions
Answers are generated from the same sourced model and provider facts shown above.
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.…
Model specifications and prices may vary by provider and change over time. AIToolly displays sources and verification dates so users can confirm critical details before production use.