Step

by StepFun Model family in Model APIs & inference, indexed and not reviewed

on OpenRouter

Not reviewed

No score, grade or rank. This listing is facts from OpenRouter and our own checks, and it stays out of the rankings until the panel reviews it.

How the index works

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...
What OpenRouter says about Step 5 Preview

Facts

Maker: StepFun
Models: 1 on OpenRouter
Newest: stepfun/step-5-preview

From OpenRouter and our own checks. JSON · Markdown

Why it's listed

OpenRouter lists it, with prices from the providers that serve it.

Being indexed says nothing about quality, and nobody can pay for it. Is this yours? Ask for a review.

Models 1

Model	Released	Context	Input / 1M	Output / 1M	Supports
Step 5 Preview `stepfun/step-5-preview`	Oct 2026	1M	$1	$2.70	tools, structured output, reasoning, caching, image, video

Prices and limits as OpenRouter lists them, in dollars per million tokens; a provider's own price can differ.

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