Hanwei Xu
Hanwei Xu is an AI researcher whose work spans open language models, multimodal understanding, code intelligence and model reasoning. He coauthored DeepSeek LLM, DeepSeek-VL, DeepSeek-V2, DeepSeek-Coder-V2 and DeepSeek-V3 in 2024. DeepSeek-R1 and DeepSeek-V3.2 explored reinforcement-learning methods for reasoning in 2025. As of October 2026, he is affiliated with DeepSeek-AI and coauthored DeepSeek Elastic Compute, a production sandbox platform for agentic training.
Timeline
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January 2024–March 2024
DeepSeek LLM and DeepSeek-VL
In January 2024, he coauthors DeepSeek LLM, a project for open language models whose pre-training dataset contains 2 trillion tokens. In March 2024, he coauthors DeepSeek-VL, an open-source vision-language model that uses a hybrid encoder for 1024 x 1024 images.
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May 2024
The DeepSeek-V2 model
In May 2024, he coauthors DeepSeek-V2, a mixture-of-experts language model with 236 billion total parameters and 21 billion active for each token.
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June 2024
DeepSeek-Coder-V2 for code
In June 2024, he coauthors DeepSeek-Coder-V2, an open-source mixture-of-experts model for code that achieves performance comparable to GPT4-Turbo in code-specific tasks.
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December 2024
DeepSeek-V3 technical report
The December 2024 DeepSeek-V3 technical report lists him as a coauthor and describes a 671-billion-parameter mixture-of-experts model with 37 billion parameters active per token.
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September 2025
DeepSeek-R1 and reasoning
In September 2025, he coauthors DeepSeek-R1, a study showing that pure reinforcement learning can elicit reasoning in large language models.
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December 2025
DeepSeek-V3.2 reasoning model
In December 2025, he coauthors DeepSeek-V3.2, a model designed to balance computational efficiency with reasoning and agent performance.
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As of October 2026
DeepSeek Elastic Compute
In September 2026, he appears among the authors of DeepSeek Elastic Compute (DSec), which lists DeepSeek-AI as an affiliation. The report presents a production sandbox platform for agentic training at scale.
Sources and credits
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- DeepSeek LLM: Scaling Open-Source Language Models with Longtermism
- DeepSeek-VL: Towards Real-World Vision-Language Understanding
- Haoyu Lu (卢浩宇)'s Homepage
- DeepSeek-V2: A Strong, Economical, and Efficient Mixture-of-Experts Language Model
- DeepSeek-Coder-V2: Breaking the Barrier of Closed-Source Models in Code Intelligence
- DeepSeek-V3 Technical Report
- DeepSeek-R1 incentivizes reasoning in LLMs through reinforcement learning
- DeepSeek-V3.2: Pushing the Frontier of Open Large Language Models
- DeepSeek Elastic Compute (DSec): A Sandbox Infrastructure for Effective Agentic Training at Scale
- DeepSeek Elastic Compute (DSec): A Sandbox Infrastructure for Effective Agentic Training at Scale