StepFun AI Models

Explore 2 curated AI models from StepFun and compare context, API pricing, modalities and capabilities.

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Model directory

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Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token.…

Context
262K
Input
$0.10
Output
$0.30
Text
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Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with a vision encoder for native image and video understanding, activating roughly 11B parameters…

Context
256K
Input
$0.20
Output
$1.15
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