Step 5 Preview
stepfun/step-5-previewStepFun's next-generation flagship base model for coding and professional knowledge work, with native text, image, and video input and a 1M-token context window
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...
Context
1M
1,000,000 tokens
Max output
66K
65,536 tokens
Input
$1.05
per 1M tokens
Output
$2.99
per 1M tokens
Providers
18
20 listings
Intelligence
43.7
Intelligence Index
Pricing
USD per 1M tokens · listed by StepFun (China)
| Token type | Standard |
|---|---|
| Input | $1.05 |
| Output | $2.99 |
| Cache read | $0.10 |
Lowest input price across providers: Free.
Capabilities
Effort: low, medium, high
Field: reasoning_content
Input
Output
Benchmarks
Published scores and Design Arena Elo
- Intelligence43.7#19 of 208
- CodingNot scored—
- AgenticNot scored—
- ArenaNot scored—
Rankings
Position on each OneAtlas leaderboard
Providers · 18
20 listings
StepFun (China)
NanoGPT
Vercel AI Gateway
Kilo Gateway
Eden AIRequesty
AI/ML API
AIHubMix
OpenCode
Novita AI
Deep Infra
CommandCode
EmpirioLabs AI
Nvidia
OpenCode Go
StepFun (Global)
StepFun Step Plan (China)
StepFun Step Plan (Global)| Provider | Model ID | Context | Input limit | Output | Input $ | Output $ | Reasoning $ | Cache read | Cache write | Audio in | Audio out | Reasoning | Tools | Structured | Temp. | Updated |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AI/ML API | stepfun/step-5-preview | 1M | 1M | 64K | $1.06 | $2.86 | — | $0.05 | — | — | — | Yes | Yes | Yes | Yes | Sep 20, 2026 |
| AIHubMix | step-5-preview | 1M | 1M | 64K | $1.08 | $3.09 | — | $0.05 | — | — | — | Yes | Yes | Yes | Yes | Sep 20, 2026 |
| CommandCode | stepfun/Step-5-Preview | 1M | 1M | 1M | $1.00 | $2.70 | — | $0.05 | — | — | — | Yes | Yes | Yes | Yes | Sep 20, 2026 |
| Deep Infra | stepfun-ai/Step-5-Preview | 1.05M | — | 1M | $1.00 | $2.70 | — | $0.10 | — | — | — | Yes | Yes | Yes | Yes | Sep 20, 2026 |
| Eden AI | tencent/step-5-preview | 1M | 1M | 1M | $1.00 | $2.70 | — | $0.05 | — | — | — | Yes | Yes | Yes | Yes | Sep 20, 2026 |
| Eden AI | deepinfra/stepfun-ai/Step-5-Preview | 1.05M | — | 1M | $1.00 | $2.70 | — | $0.10 | — | — | — | Yes | Yes | Yes | Yes | Sep 20, 2026 |
| EmpirioLabs AI | step-5-preview | 1.02M | — | 131K | $1.00 | $2.70 | — | $0.05 | — | — | — | Yes | Yes | Yes | Yes | Sep 20, 2026 |
| Kilo Gateway | stepfun/step-5-preview | 1M | 1M | 64K | $1.00 | $2.70 | — | $0.10 | — | — | — | Yes | Yes | Yes | Yes | Sep 20, 2026 |
| NanoGPT | stepfun/step-5-preview | 1M | 1M | 66K | $1.00 | $2.70 | — | $0.05 | — | — | — | Yes | Yes | Yes | Yes | Sep 20, 2026 |
| Novita AI | stepfun/step-5-preview | 1M | 1M | 64K | $1.00 | $2.70 | — | $0.10 | — | — | — | Yes | Yes | Yes | Yes | Sep 20, 2026 |
| Nvidia | stepfun-ai/step-5-preview | 1.05M | 1.05M | 1.05M | Free | Free | — | — | — | — | — | Yes | Yes | No | Yes | Sep 20, 2026 |
| OpenCode | step-5-preview-free | 1M | 1M | 66K | Free | Free | — | Free | — | — | — | Yes | Yes | Yes | Yes | Sep 20, 2026 |
| OpenCode Go | step-5-preview | 1M | 1M | 66K | $1.00 | $2.70 | — | $0.10 | — | — | — | Yes | Yes | Yes | Yes | Sep 20, 2026 |
| OpenCode Go | step-5-preview-free | 1M | 1M | 66K | Free | Free | — | Free | — | — | — | Yes | Yes | Yes | Yes | Sep 20, 2026 |
| Requesty | step-5-preview | 1.05M | — | 66K | $1.00 | $2.70 | — | $0.05 | — | — | — | Yes | Yes | Yes | Yes | Sep 20, 2026 |
| StepFun (China) | step-5-preview | 1M | 1M | 66K | $1.05 | $2.99 | — | $0.10 | — | — | — | Yes | Yes | Yes | Yes | Sep 20, 2026 |
| StepFun (Global) | step-5-preview | 1.02M | 1.02M | 66K | $1.00 | $2.70 | — | $0.10 | — | — | — | Yes | Yes | Yes | Yes | Sep 20, 2026 |
| StepFun Step Plan (China) | step-5-preview | 1M | 1M | 66K | — | — | — | — | — | — | — | Yes | Yes | Yes | Yes | Sep 20, 2026 |
| StepFun Step Plan (Global) | step-5-preview | 1M | 1M | 66K | — | — | — | — | — | — | — | Yes | Yes | Yes | Yes | Sep 20, 2026 |
| Vercel AI Gateway | stepfun/step-5-preview | 1.05M | — | 1.05M | $1.00 | $2.70 | — | $0.10 | — | — | — | No | No | Yes | Yes | Sep 20, 2026 |