Models / stepfun

Step 3.5 Flash

by stepfun · stepfun/step-3.5-flash

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....

reasoningtool-usereleased 2026-01-29

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Legal score · raw

not yet benchmarked

Context

262K

max output 66K

Input

$0.13

per 1M tokens

Output

$0.38

per 1M tokens

Suite cost

no run recorded

Benchmark results

This model has not been run through the suite yet. See Humanity's Last Lawsuit for the benchmark models are ranked on.