Step 3.5 Flash

Name: Step 3.5 Flash
Brand: stepfun

Active

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

$0.10

Output / 1M tokens

$0.30

Record updated 2026-09-03

Modality:LLM

Context:262,144 tokens

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Pricing

Platform

Scope

Input

Output

Details

OpenRouter

Unified API Router

Standard

$0.10

$0.30

262k context · 66k max output

Latest changes

No recent changes.

Benchmarks

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