Step 5 Preview
by Kilo Gateway · listed Sep 2026RTV
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...
Current rates USD per 1M tokens
Input$1.00
Output$2.70
Cache read$0.05
Cache write—
Against the market
On the record
- Model id
stepfun/step-5-preview- Context window
- 1M tokens
- Max output
- 64K tokens
- Input modalities
- text, image, video
- Output modalities
- text
- Reasoning
- yes
- Tool calls
- yes
- Open weights
- no
- Knowledge cutoff
- —
- Released
- 2026-09-16
- Last updated
- 2026-09-20
- Provider docs
- kilo.ai
Back of the envelope
≈
Also listed at
- StepFun (China)$0.959 in · $2.74 out
- EmpirioLabs AI$1.00 in · $2.70 out
- NanoGPT$1.00 in · $2.70 out
- Novita AI$1.00 in · $2.70 out
- OpenRouter$1.00 in · $2.70 out
- Vercel AI Gateway$1.00 in · $2.70 out
- StepFun (Global)$1.00 in · $2.70 out
- AIHubMix$1.08 in · $3.09 out
- AI/ML API$1.38 in · $3.71 out
- StepFun Step Plan (Global)— in · — out
- StepFun Step Plan (China)— in · — out