# Step 3.5 Flash API pricing

The official API price of Step 3.5 Flash is $0.10461 per 1M input tokens and $0.31384 per 1M output tokens (as of 2026-11-12). Context window: 256K tokens, up to 256K output tokens per request. 15 providers sell it. The lowest is CommandCode: $0.09 input, $0.3 output.

- Type: Text
- Context: 256K
- Max output: 256K
- Released: 2026-01-29
- Open weights: Yes

## Price by provider (USD per 1M tokens)

| Provider | Model id | Input | Output | Cached | Notes |
| --- | --- | --- | --- | --- | --- |
| [StepFun (China)](https://platform.stepfun.com/docs/zh/overview/concept) | step-3.5-flash | $0.10461 | $0.31384 | $0.02092 | Official |
| [CommandCode](https://commandcode.ai/docs/provider) | stepfun/Step-3.5-Flash | $0.09 | $0.3 | $0.02 | Lowest |
| [Eden AI](https://docs.edenai.co) | deepinfra/stepfun-ai/Step-3.5-Flash | $0.09 | $0.3 | $0.02 |  |
| [EmpirioLabs AI](https://docs.empiriolabs.ai) | step-3-5-flash | $0.1 | $0.3 | $0.02 |  |
| [Hugging Face](https://huggingface.co/docs/inference-providers) | stepfun-ai/Step-3.5-Flash | $0.1 | $0.3 | — |  |
| [Kilo Gateway](https://kilo.ai) | stepfun/step-3.5-flash | $0.1 | $0.3 | — |  |
| [NanoGPT](https://docs.nano-gpt.com) | stepfun-ai/step-3.5-flash | $0.1 | $0.3 | $0.05 |  |
| [OpenRouter](https://openrouter.ai/models) | stepfun/step-3.5-flash | $0.1 | $0.3 | — |  |
| [SiliconFlow](https://cloud.siliconflow.com/models) | stepfun-ai/Step-3.5-Flash | $0.1 | $0.3 | — |  |
| [StepFun (Global)](https://platform.stepfun.ai/docs/en/overview/concept) | step-3.5-flash | $0.1 | $0.3 | $0.02 |  |
| [ZenMux](https://docs.zenmux.ai) | stepfun/step-3.5-flash | $0.1 | $0.3 | — |  |
| [SiliconFlow (China)](https://cloud.siliconflow.com/models) | stepfun-ai/Step-3.5-Flash | $0.104613 | $0.31384 | — |  |
| [Qiniu](https://developer.qiniu.com/aitokenapi) | stepfun/step-3.5-flash | — | — | — | Deprecated |
| [StepFun Step Plan (Global)](https://platform.stepfun.ai/docs/en/step-plan/integrations/reasoning-api) | step-3.5-flash | — | — | — |  |
| [StepFun Step Plan (China)](https://platform.stepfun.com/docs/zh/step-plan/integrations/reasoning-api) | step-3.5-flash | — | — | — |  |

Providers are those listed by models.dev. This site has not vetted them one by one; each provider's own page has the binding price.

Prices and specs come from models.dev (MIT licence), updated 2026-11-12. Each provider's name links to its official docs. A provider priced at 0 usually includes the model in a subscription; it is not necessarily a free API.

https://apibook.ai/models/stepfun/step-3.5-flash/