Step 3.5 Flash 2603
StepFun AI first-party · 256,000 ctx · from $0.1 input / $0.3 output per 1M tokens
- Input price ranks #122 of 447 priced models (cheaper = better).
- Cheaper alternative with ≥ same context: Step 3.5 Flash at $0.09 input.
| Provider | StepFun AI |
|---|---|
| Family | |
| Context window | 256,000 |
| Max output | 256,000 |
| Input price | $0.1 |
| Output price | $0.3 |
| Cache read | $0.02 |
| Cache write | — |
| Reasoning | Yes |
| Tool calling | Yes |
| Vision | No |
| Open weights | Yes |
| Knowledge cutoff | 2025-01 |
| Released | 2026-04-02 |
| Last updated | 2026-04-02 |
Available from 2 curated sources
| Source | Input | Output |
|---|---|---|
| StepFun AI first-party | $0.1 | $0.3 |
| StepFun first-party | $0.1 | $0.3 |
Identity: StepFun AI; data via models.dev + OpenRouter public APIs. Always confirm on the provider's official pricing page.