← Market
Chat · 阶跃星辰
StepFun: Step 5 PreviewNEW
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...
Playground
Run this model with a pre-filled form — the same billed path as the API.
Conversation
✦
How can I help you today?
This demo page does not include the full memory features of the client. For the complete experience, please use the client or the CLI.
Rate card
| input | 250 credits 1M tokens |
| output | 675 credits 1M tokens |
Flat price per run — it does not change with duration.
Quick start
POST/v1/jobs/createTask
curl -X POST https://modelfold.ai/v1/jobs/createTask \
-H "Authorization: Bearer $MODELFOLD_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"step-5-preview","input":{"prompt":"..."}}'