StepFun: Step 5 Preview
stepfun/step-5-preview
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...
Modalities
In / Out Price
$1 / $2.70 per 1M
Context
1M
Released
Oct 8, 2026
Knowledge Cutoff
—
Providers
Different carriers host the same model. Reroute routes each request to the best one on price and uptime, and fails over to the next if a carrier goes down.
| Provider | Context | Input /M | Output /M | Cache read /M | Latency | Throughput | Uptime |
|---|---|---|---|---|---|---|---|
| StepFunfp8 | 1M | $1 | $2.70 | $0.05 | — | — | 100.00% |