Jieyue Xingchen Open-Sources Step 3.5 Flash
💡196B MoE Agent model open-sourced: 350TPS inference speed
⚡ 30-Second TL;DR
What Changed
Open-sourced Base/midtrain weights and Steptron framework
Why It Matters
Enables developers to build efficient AI Agents with high-speed MoE inference, lowering barriers for custom training and deployment.
What To Do Next
Clone the GitHub repo for Steptron and test fine-tuning Step 3.5 Flash on agent benchmarks.
Key Points
- •Open-sourced Base/midtrain weights and Steptron framework
- •Sparse MoE: 196B total, ~11B active params at inference
- •350 TPS peak on single-request code tasks
- •Agent-focused base model from Chinese startup
🧠 Deep Insight
Background and context from public sources — not the original article. 8 sources cited.
🔑 Enhanced Key Takeaways
- •Jieyue Xingchen, founded in 2023 in Shanghai by ex-Microsoft VP Jiang Daxin and other alumni, has released over 30 large models, establishing it as a leader in China's multi-modality AI competition.[1][2][5]
- •The company secured a record 5 billion yuan Series B+ financing in early 2026 from investors including Tencent, Qiming, Wuyuan, and Huaqin Technology, marking the largest single-round funding in China's LLM track.[1][3]
- •StepFun formed alliances like the Model-Chip Ecosystem Innovation Alliance in July 2025 with Huawei, Biren, Moore Threads, and others, and integrated with DeepSeek alongside competitors like 01.AI and MiniMax.[6][7]
🔮 Future ImplicationsAI analysis grounded in cited sources
⏳ Timeline
📎 Sources (8)
Factual claims are grounded in the sources below. Forward-looking analysis is AI-generated interpretation.
- eu.36kr.com — 3655608589082757
- scmp.com — Shanghai AI Start Founded Ex Microsoft Engineers Bets Scaling Law Boost AI Capabilities
- eu.36kr.com — 3656253226578441
- aibase.com — 15649
- technode.com — Meet Chinas Top Six AI Unicorns Who Are Leading the Wave of AI in China
- en.wikipedia.org — Stepfun
- pandaily.com — Zhipu AI Secures Strategic Financing From Hangzhou State Owned Investors
- trustiics.com — Deepseek Shareholders
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Original source: 36氪 ↗
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