StepFun: Step 5 Preview

NEW

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...

1M context·$1.00 in·$2.70 out·Oct 2026 release·Vision, Reasoning, Tools / functions, Web search

Available on

OpenRouter

Providers

Where StepFun: Step 5 Preview runs in Big-AGI, with each service's own model ID and USD-per-1M-token rates. The summary above prefers the creator's claim; rates below are each service's own.

ServiceModel IDContextInputOutputCache read

OpenRouter

stepfun/step-5-preview

$1.00

$2.70

$0.05

Specs as reported by each service · usage over the last 2 days · refreshed hourly

Run StepFun: Step 5 Preview in Big-AGI.

Connect your own key on any of the services above, at their rates, no markup - and run it side by side with every other model.

Launch Big-AGI

BIG-AGI

Product

Features Models Controls What's new BEAM Technology

Resources

Documentation Discord GitHub

Company

Email Us Privacy Terms