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Step 5 Preview – Benchmarks, Pricing & Intelligence Analysis

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...

Not available on LLMBase

Step 5 Preview is not currently available in LLMBase Chat or the LLMBase Inference API. Benchmarks, pricing, and model details remain available for research and comparison.

Input Price

$1.00/1M tokens

Output Price

$2.70/1M tokens

Intelligence

43.7

Coding

N/A

Specifications

Technical details and pricing.

ProviderStepfun
Context Window1,000,000 tokens
Release DateSep 18, 2026
ModalitiesText
CapabilitiesFunction Calling
AvailabilityNot available

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Frequently Asked Questions

What is Step 5 Preview good for?

Use Step 5 Preview for everyday tasks like writing, summarizing, brainstorming, and getting clear explanations.

How much does Step 5 Preview cost?

Pricing is based on usage. Current rates are $1.00/1M tokens for input and $2.70/1M tokens for output.

Is Step 5 Preview available in LLMBase Chat yet?

Not yet on this page. We will add chat and inference actions automatically once an exact catalog entry exists for Step 5 Preview.

Does Step 5 Preview support images or audio?

Step 5 Preview focuses on text-based tasks.

Benchmarks and pricing use Artificial Analysis where available. Catalog specs are used as a fallback.