Qinyu Chen
Qinyu Chen is a DeepSeek-AI researcher whose work spans mixture-of-experts language models, reasoning, conditional memory, and inference. In 2024, they coauthored DeepSeek-V2 and DeepSeek-V3; in 2025, they coauthored DeepSeek-R1 and DeepSeek-V3.2. Their 2026 work includes Engram’s conditional memory, DSpark’s speculative decoding, and DeepSeek-V4.1-Flash’s long-context model design. As of October 2026, they are part of DeepSeek-AI’s Research & Engineering team.
Timeline
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May 2024
DeepSeek-V2 technical report
In May 2024, they coauthor DeepSeek-V2, a mixture-of-experts language model with 236B total parameters and 21B activated for each token.
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December 2024
DeepSeek-V3 technical report
The December 2024 DeepSeek-V3 technical report describes a mixture-of-experts model with 671B total parameters and 37B activated for each token; Chen is a coauthor.
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September 2025
DeepSeek-R1 in Nature
In September 2025, they coauthor the Nature paper on DeepSeek-R1, which shows that pure reinforcement learning can encourage reasoning without human-labelled reasoning trajectories.
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December 2025
DeepSeek-V3.2 technical report
DeepSeek-V3.2 combines efficient attention, scalable reinforcement learning, and a pipeline for agent-training data; Chen coauthors the report in December 2025.
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July 2026
Conditional memory with Engram
In July 2026, they coauthor an ACL paper that introduces Engram, a conditional-memory module using local n-gram lookup. The paper reports gains on knowledge and reasoning benchmarks.
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July 2026
DSpark speculative decoding
They coauthor DSpark in July 2026, a speculative-decoding framework that combines parallel generation with adaptive, load-aware verification. In DeepSeek-V4 serving, it accelerates per-user generation by 60–85% at matched throughput.
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September 2026
DeepSeek-V4.1-Flash model
In September 2026, they coauthor DeepSeek-V4.1-Flash, a multimodal mixture-of-experts model with 552B backbone parameters and contexts up to one million tokens. Its design reduces the global key-value cache footprint to about one quarter of DeepSeek-V4-Flash.
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As of October 2026
Research and engineering at DeepSeek-AI
As of October 2026, they are part of DeepSeek-AI’s Research & Engineering team.
Most-cited works
- DeepSeek-R1 incentivizes reasoning in LLMs through reinforcement learningWith Bingxuan Wang, Chengqi Deng, Damai Dai, Daya Guo, Erhang Li and Fangyun Lin
- Can Open Large Language Models Catch Vulnerabilities?With Bingxuan Wang, Chengqi Deng, Damai Dai, Erhang Li, Fangyun Lin and Haocheng Wang
- Robust pavement crack segmentation network based on transformer and dual-branch decoder
- Managing the value Co-creation of peer service providers in the sharing economy: The perspective of customer incivility
- Conflict with children, psychological depression, and problematic internet use among Chinese older adults: The moderating effect of sociability and living situation
Sources and credits
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- DeepSeek-V2: A Strong, Economical, and Efficient Mixture-of-Experts Language Model
- DeepSeek-V3 Technical Report
- DeepSeek-R1 incentivizes reasoning in LLMs through reinforcement learning
- DeepSeek-V3.2: Pushing the Frontier of Open Large Language Models
- Conditional Memory via Scalable Lookup: A New Axis of Sparsity for Large Language Models
- Conditional Memory via Scalable Lookup: A New Axis of Sparsity for Large Language Models
- DSpark: Confidence-Scheduled Speculative Decoding with Semi-Autoregressive Generation
- DeepSeek-V4.1-Flash: Pushing the Limits of KV Cache Compression
