StepFun API pricing
List prices for 3 StepFun models per million tokens, and what 1,000 requests a day cost.
3models
| Model | Input / 1M | Cached / 1M | Output / 1M | Per month | AA Intelligence Index |
|---|---|---|---|---|---|
| Step 3.5 Flash | $0.700 | $0.140 | $2.10 | $73.5 | 17.0 |
| Step 3.7 Flash | $1.35 | $0.270 | $8.10 | $203 | 19.5 |
| Step 5 Preview | $7.00 | $0.350 | $20 | $720 | 43.7 |
Per month: 1,000 requests a day, 2,000 input and 500 output tokens each, no caching, 30 days.
Data: real-api-pricing (MIT) · prices as of Oct 16, 2026
Questions
- What is the cheapest StepFun API model?
- Step 3.5 Flash has the lowest list price of the 3 StepFun models here: $0.700 per 1M input tokens and $2.10 per 1M output tokens. At 1,000 requests a day (2,000 input and 500 output tokens each) that comes to about $73.5 a month.
- Which StepFun model costs the most?
- Step 5 Preview, at $7.00 per 1M input tokens and $20 per 1M output tokens: about $720 a month for the same workload.
- Is cached input cheaper on StepFun?
- Yes. On Step 3.5 Flash, cached input is $0.140 per 1M tokens against $0.700 for fresh input.