API ManyNew models: Qwen 3.8 Max, Claude Haiku 5.5, Claude Opus 5.5, Claude Sonnet 5.5Step 3.7 Flash by StepFun is available on API Many from $0.17 per million input tokens and $1.02 per million output tokens, and you call it with the same API key you use for every other model.
It accepts OpenAI-style chat requests with streaming and tools.
You pay only for successful results: failed or rejected requests are refunded automatically, and every call is recorded in your console with its exact cost.
Step 3.7 Flash starts at $0.17 per million input tokens and $1.02 per million output tokens on API Many. The price table on this page lists every tier; you are charged only for successful requests.
Create an API key in the console, then send a request to /v1/chat/completions with "model": "step-3.7-flash". The API tab has copy-ready examples in cURL, Python and Node.js.
Yes. Requests are forwarded to the model maker or an authorized channel with the same parameters, so the output matches the official API.
Failed, rejected or timed-out requests are not charged. Reserved balance is released automatically and the reason is shown in the call record.
