Zijia Zhu
Zijia Zhu is an AI researcher whose name appears on DeepSeek technical reports about language models, reasoning and efficient inference. They coauthored the DeepSeek-V3 report in 2024, which described a 671-billion-parameter model trained on 14.8 trillion tokens. Their 2025 papers covered DeepSeek-R1's reinforcement-learning approach to reasoning and DeepSeek-V3.2's efficient reasoning and agent performance; DeepSeek-V4 added million-token contexts in 2026. As of October 2026, they are listed as a coauthor of DeepSeek-V4.1-Flash, a report on KV-cache compression.
Timeline
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December 2024
DeepSeek-V3 technical report
In December 2024, they coauthor the DeepSeek-V3 report, which describes a 671-billion-parameter mixture-of-experts model with 37 billion active parameters per token. Its training uses 14.8 trillion tokens.
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January 2025–September 2025
DeepSeek-R1 reasoning report
In January 2025, they coauthor the DeepSeek-R1 report, which shows that pure reinforcement learning can encourage reasoning abilities in language models. The September 2025 Nature article credits the authors with collecting and curating data, designing experiments and building the LLM training framework.
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December 2025
DeepSeek-V3.2 technical report
In December 2025, they coauthor DeepSeek-V3.2, a report on a model designed for high computational efficiency, reasoning and agent performance.
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April 2026
DeepSeek-V4 million-token models
In April 2026, they coauthor the DeepSeek-V4 report, which presents two mixture-of-experts models with context lengths of one million tokens.
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As of October 2026
DeepSeek-V4.1-Flash KV-cache work
As of October 2026, they are listed as a coauthor of DeepSeek-V4.1-Flash. Its September 2026 report describes cross-layer KV-cache reuse and FP4 caching to reduce cache size.
Sources and credits
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- DeepSeek-V3 Technical Report
- DeepSeek-R1: Incentivizing Reasoning Capability in LLMs via Reinforcement Learning
- DeepSeek-R1 incentivizes reasoning in LLMs through reinforcement learning
- DeepSeek-V3.2: Pushing the Frontier of Open Large Language Models
- DeepSeek-V4: Towards Highly Efficient Million-Token Context Intelligence
- DeepSeek-V4.1-Flash: Pushing the Limits of KV Cache Compression
- DeepSeek-V4.1-Flash: Pushing the Limits of KV Cache Compression | alphaXiv