Step 3.5 Flash 2603
StepFunProprietary256k context
Step 3.5 Flash 2603 is a proprietary model from StepFun with a 256k-token context window. 1 provider lists it, at $0.10 per million input tokens and $0.30 per million output tokens (StepFun).
- Maker
- StepFun
- Licence
- Proprietary
- Context window
- 256k
- Providers listed
- 1
- Lowest input, per 1M
- $0.10
- Lowest output, per 1M
- $0.30
- StepFun's own API, per 1M
- $0.10 in · $0.30 out
Providers serving Step 3.5 Flash 2603
Cheapest first, by the blended rate of three input tokens to one output token. Prices in US dollars per million tokens, as of 26 Oct 2026.
| Provider | Input | Output | Context | Tools | JSON mode | OpenAI-compatible | Model ID |
|---|---|---|---|---|---|---|---|
StepFun | $0.10 | $0.30 | 256k | Yes | Yes | Yes | step-3.5-flash-2603 |