Step 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total parameters). It performs strongly in software engineering and professional...
Input / 1M
$1.00
Output / 1M
$2.70
Cached input / 1M
$0.05
Context window
1M
Price history
Snapshots
| Effective | Input | Output | Cached in | Note | Source |
|---|---|---|---|---|---|
| 8 Oct 2026 | $1.00 | $2.70 | $0.05 | Imported from OpenRouter | openrouter.ai |