API pricing
StepFun API pricing
StepFun API prices run from $0.10 per million input tokens (Step 3.5 Flash) to $5.21 (Step 2 (16K)). Its highest-ranked model, Step 5 Preview, costs $1 input and $2.70 output per million tokens.
Last verified
| Cached input | ||||||
|---|---|---|---|---|---|---|
| Step 3.5 Flash (open weights) | $0.10 | $0.30 | $0.02 | $0.15 | 256K | 42.3 |
| Step 3.7 Flash (open weights) | $0.18 | $1.11 | $0.037 | $0.42 | 256K | 37.3 |
| Step 5 Preview | $1 | $2.70 | $0.05 | $1.43 | 1.02M | 47.9 |
| Step 1 (32K) | $2.05 | $9.59 | $0.41 | $3.93 | 33K | — |
| Step 2 (16K) | $5.21 | $16.44 | $1.04 | $8.02 | 16K | — |
Prices on other platforms
The same models are often sold through clouds and resellers at different rates.
| Model | Route | Input | Output | Checked |
|---|---|---|---|---|
| Step 5 Preview | openrouter | $1 | $2.70 | 2026-10-10 |
| stepfun | $1 | $2.70 | 2026-10-10 | |
| Step 3.5 Flash | openrouter | $0.10 | $0.30 | 2026-10-10 |
| stepfun | $0.10 | $0.30 | 2026-10-10 | |
| Step 3.7 Flash | deepinfra | $0.20 | $1.15 | 2026-10-10 |
| openrouter | $0.20 | $1.15 | 2026-10-10 | |
| stepfun | $0.18 | $1.11 | 2026-10-10 | |
| Step 1 (32K) | stepfun | $2.05 | $9.59 | 2026-10-10 |
| Step 2 (16K) | stepfun | $5.21 | $16.44 | 2026-10-10 |
Frequently asked questions
How much does the StepFun API cost?
StepFun API prices run from $0.10 per million input tokens (Step 3.5 Flash) to $5.21 (Step 2 (16K)). Its highest-ranked model, Step 5 Preview, costs $1 input and $2.70 output per million tokens.
Does StepFun discount cached input?
Yes. Cached input is billed at a lower rate on 5 of the 5 priced models; the cached rate is listed next to each model.