StepFun'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
Capability badges appear only where the provider catalog explicitly lists support. A blank cell means the source is silent, not that the feature is absent.
Listed rates
Price across providers
Input price per million tokens as published by each provider. Bars are drawn from listed rates only — no traffic weighting, since the catalog observes no requests.
Lowest input$1/M
Across 3 priced providers
Median input$1/M
Midpoint of listed rates
Highest input$1/M
Same as the lowest listed rate
Output range$2.7 – $2.7
Per million output tokens
NanoGPT$1/M
Vercel AI Gateway$1/M
EmpirioLabs AI$1/M
Cost calculator
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$0.00
Excludes taxes, non-token charges, and tiered discounts.
3 providers list the identical $1 input rate, so price alone will not separate them — compare context limits, max output, and capabilities above.
Context limits also differ by provider, from 1M to 1.024M tokens. Compare the provider table above before choosing on price alone.
Specification
Capabilities
Recorded from the source catalog and provider listings.
Every result stays attached to its source, version, metric and harness. Scores from different versions are never merged, and the profile below plots each benchmark against its own population rather than on a shared scale.
ModelBench does not infer quality from price, context size, or model name. When a source publishes a comparable result, it appears here with its version and link.
Answered directly from the stored record — nothing here is generated beyond the catalog's own fields.
What is Step 5 Preview?
StepFun'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. It is published by StepFun and catalogued here from Models.dev.
How much does Step 5 Preview cost?
Listed input pricing starts at $1 per million tokens from NanoGPT.
What is the context length of Step 5 Preview?
Step 5 Preview accepts up to 1M tokens of context and returns up to 1M output tokens.
Does Step 5 Preview support tool calling and structured output?
Provider catalogs list support for tool calling, structured output, reasoning, and image input.
Which providers serve Step 5 Preview?
4 providers list this model: StepFun Step Plan (China), NanoGPT, Vercel AI Gateway, EmpirioLabs AI.
Are the weights for Step 5 Preview open?
No. This model is served through hosted APIs only.
When was Step 5 Preview released?
The catalog records a release date of 2026-09-16, last verified Sep 21, 2026.
