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.
- Canonical page: https://noometry.com/llm-pricing/stepfun
- Last updated: 2026-10-10
- Title: StepFun API Pricing (October 2026): Every Model per 1M Tokens

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 October 10, 2026

API prices per million tokens
|  |  |  | Cached input |  |  |  |
| --- | --- | --- | --- | --- | --- | --- |
| [Step 3.5 Flash](https://noometry.com/models/step-3-5-flash) (open weights) | $0.10 | $0.30 | $0.02 | **$0.15** | 256K | 42.3 |
| [Step 3.7 Flash](https://noometry.com/models/step-3-7-flash) (open weights) | $0.18 | $1.11 | $0.037 | **$0.42** | 256K | 37.3 |
| [Step 5 Preview](https://noometry.com/models/step-5-preview) | $1 | $2.70 | $0.05 | **$1.43** | 1.02M | 47.9 |
| [Step 1 (32K)](https://noometry.com/models/step-1) | $2.05 | $9.59 | $0.41 | **$3.93** | 33K | — |
| [Step 2 (16K)](https://noometry.com/models/step-2) | $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](https://noometry.com/models/step-5-preview) | openrouter | $1 | $2.70 | 2026-10-10 |
|  | stepfun | $1 | $2.70 | 2026-10-10 |
| [Step 3.5 Flash](https://noometry.com/models/step-3-5-flash) | openrouter | $0.10 | $0.30 | 2026-10-10 |
|  | stepfun | $0.10 | $0.30 | 2026-10-10 |
| [Step 3.7 Flash](https://noometry.com/models/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)](https://noometry.com/models/step-1) | stepfun | $2.05 | $9.59 | 2026-10-10 |
| [Step 2 (16K)](https://noometry.com/models/step-2) | 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.