StepFun

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Shanghai-based lab

Shanghai Jieyue Xingchen Intelligent Technology Co., Ltd is an artificial intelligence (AI) company based in Shanghai, China. It has been dubbed one of China's "AI Tiger" companies by investors.

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+1.2%Velocity (7d)

First seen: Mar 24, 2026Last active: 7h agoWikipedia

Timeline

Research MilestoneFeb 24, 2026
Published technical report for Step-3.5-Flash model achieving state-of-the-art performance on benchmarks.
View source
benchmarks:
AIME 2025, LiveCodeBench-V6
parameter count:
196B
active parameters:
11B

Relationships

Developed

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Step-3.5-Flash
ai model1 source100% conf.

Recent Articles

Step-3.5-Flash: 196B Open-Source MoE Model Activates Only 11B Parameters, Outperforms Kimi K2.5 and Claude Opus 4.5 on Key Benchmarks
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Shanghai-based StepFun's Step-3.5-Flash, a 196B parameter sparse mixture-of-experts model that activates only 11B parameters per token, achieves top s
8h ago88 relevance

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