Step 5 Preview vs Step 3.5 Flash
Step 3.5 Flash is cheaper on output tokens, while Step 5 Preview offers a larger context window. Choose Step 5 Preview or Step 3.5 Flash based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Step 5 Preview | Step 3.5 Flash |
|---|---|---|
| Provider | StepFun (Global) | StepFun (Global) |
| Input / 1M tokens | $1.00 | $0.10 |
| Output / 1M tokens | $2.70 | $0.30 |
| Context window | 1M | 256K |
| Parameters | — | — |
| Open weights | No | Yes |
| Released | Sep 2026 | Jan 2026 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.