StepFun API pricing
StepFun (阶跃星辰) Step models, including the very cheap "flash" tier for high-volume work.
StepFun models — price per 1M tokens
All prices in USD, last verified 2026-06-26. Cheapest reference cost first; click a column to re-sort.
| Model | Input /1M | Output /1M | Cost / call* | Context | Type |
|---|---|---|---|---|---|
| Step 3.5 Flash Cheapest Step tier | $0.090 | $0.300 | $0.0004 | 256K | Fast / cheap |
| Step 3.7 Flash Fast tier | $0.200 | $1.15 | $0.0014 | 256K | Fast / cheap |
*Reference cost of one call with 1,000 input + 1,000 output tokens — a neutral yardstick. Use the calculator for your real usage. Cheapest row highlighted.
How StepFun API pricing works
StepFun bills per token: an input price for everything you send and a higher output price for what the model generates, both quoted per million tokens. To estimate a real bill, multiply by your monthly request volume — the cost calculator does this across every model at once.
Before committing to volume, always confirm the current numbers on the official StepFun pricing page — the list prices here are verified periodically but the market moves fast.