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 knowledge work, with particular strength in finance. It is designed for extended tasks that span large codebases and documents, using tools and refining results over multiple steps.
Model specifications
- Input
- text, image, video
- Output
- text
- Context
- 1,024,000 tokens
- Max output
- 64,000 tokens
- Input price
- $1 / 1M tokens
- Output price
- $2.7 / 1M tokens
- Released
- 2026-10-08
Capabilities
- Streaming
- Function calling
- Vision
- JSON mode
Provider pricing, discounts and data privacy
Compare effective provider prices, published discounts, regions, retention policies, training use, compliance, and privacy links by service tier.
Standard service tier
1 available provider · tier input average $1 / 1M tokens · tier output average $2.7 / 1M tokens
StepFun
Tier: Standard
Pricing
- Input
- $1 / 1M tokens
- Output
- $2.7 / 1M tokens
- Cache read
- $0.05 / 1M tokens
No provider discount is currently published.
Data privacy and compliance
- Zero data retention
- No
- Data retention
- Unknown retention
- Used for training
- Yes
- Data collection
- Moderated
- No
- GDPR compliant
- No
- HIPAA compliant
- No
- SOC 2 certified
- No
- BYOK supported
- No
Frequently asked questions
- What is 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 knowledge work, with particular strength in finance. It is designed for extended tasks that span large codebases and documents, using tools and refining results over multiple steps.
- How much does StepFun: Step 5 Preview cost?
- Input costs start at $1 / 1M tokens and output costs start at $2.7 / 1M tokens. Provider-level prices vary by service tier.
- What is the context length of StepFun: Step 5 Preview?
- StepFun: Step 5 Preview supports a 1,024,000 token context window and up to 64,000 output tokens.
- What capabilities does StepFun: Step 5 Preview support?
- StepFun: Step 5 Preview supports Streaming, Function calling, Vision, JSON mode.
- Which providers offer StepFun: Step 5 Preview?
- StepFun: Step 5 Preview is available from StepFun.
- How do providers handle data privacy for StepFun: Step 5 Preview?
- 1 of 1 providers report that customer data is not used for training, and 0 offer zero-data-retention routing. Retention, compliance, and privacy-policy links are listed per provider.