StepFun models

StepFun ships the Step series. Zeplik carries the Flash speed tiers — Step 3.7 Flash and Step 3.5 Flash.

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All 3 StepFun models

Pricing at a glance

Frequently asked questions

Which StepFun models can I use on Zeplik?

Zeplik carries 3 StepFun models: Step 5 Preview, Step 3.7 Flash and Step 3.5 Flash. They all run in the same chat, so you do not need a separate StepFun account or API key.

How much do StepFun models cost on Zeplik?

Output tokens run from 3.6 to 32.4 credits per million depending on which StepFun model you pick (raw provider rates $0.30 to $2.70 per million). 1 credit = $0.10, computed from the raw provider rate with a 1.20x margin.

Which StepFun model has the largest context window?

Step 5 Preview, at 1M tokens (1,000,000). The context window covers the conversation plus any documents you attach.

Do StepFun models support images and tool calling?

2 of the 3 accept image input, and all of them support tool calling.

Do I need a paid plan to use StepFun models on Zeplik?

All 3 need a paid plan (Plus or above). Usage is then billed in credits from your monthly allowance.

What is the newest StepFun model on Zeplik?

Step 5 Preview, released October 2026. Step 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total parameters).

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