StepFun: Step 3.5 Flash API Pricing
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....
Input / 1M tokens
$0.09
Output / 1M tokens
$0.30
Cost per request (1K in / 500 out)
$0.0002
~$0.24 per 1M tokens mixed
Specifications
Context Window 262K tokens
Max Output Tokens 16,384
Vision Support No
Function Calling No
Streaming Yes
Modality text
Release Date 2026-01-29
Price history will appear here after the first price change is detected.
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