stepfun API Pricing
stepfun offers 3 API models in the catalog. Combined input+output prices range from $0.4 (StepFun: Step 3.5 Flash) to $3.7 (StepFun: Step 5 Preview) per 1M tokens. Its most recent model is StepFun: Step 5 Preview at $1 input / $2.7 output.
| Model | Input /1M | Output /1M | Cached in /1M | Context |
|---|---|---|---|---|
| StepFun: Step 3.5 Flash | $0.1 | $0.3 | — | 262,144 |
| StepFun: Step 3.7 Flash | $0.2 | $1.15 | $0.04 | 262,144 |
| StepFun: Step 5 Preview | $1 | $2.7 | $0.1 | 1,048,576 |
Frequently asked questions
What is the cheapest stepfun model?
The cheapest stepfun model by combined price is StepFun: Step 3.5 Flash at $0.1 input and $0.3 output per 1M tokens.
How many models does stepfun offer via API?
stepfun lists 3 models in the OpenRouter catalog as of October 21, 2026.
Price snapshot October 21, 2026, refreshed daily.