Step 5 Preview
by OpenRouter · listed Sep 2026RTV
StepFun flash model for efficient multimodal reasoning, coding, and tool use
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
- openrouter.ai/models
Back of the envelope
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