# StepFun: Step 5 Preview

Provider: stepfun  
Category: llm  
Model ID: `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...

## Specs

- Context length: 1000000 tokens
- Max output: 64000 tokens
- Modalities: text, image, video
- Released: 2026-10-08

## Pricing

- Input: $1.00 per million tokens
- Output: $2.70 per million tokens

## Providers

- **stepfun** — ctx 1000000, input $1.00/M, output $2.70/M

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Last verified: 2026-10-19T02:30:34.239Z  
Canonical URL: https://switchy.build/directory/models/step-5-preview