Step 3.5 Flash
Step 3.5 Flash is StepFun's language model with a 262K context window and up to 66K output tokens, starting at $0.100 / 1M input and $0.300 / 1M output. An open-source Mixture-of-Experts reasoning model from StepFun with 196B total parameters (11B active), featuring a 256K context window and tool-calling support.
Capabilities
Input1/5
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Output1/5
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Capabilities3/13
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Pricing by Provider
| Provider | Standard | |
|---|---|---|
| Input $ / 1M | Output $ / 1M | |
 OpenRouter | $0.100 | $0.300 |
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