Tianhao Li
Tianhao Li is an AI researcher whose work connects multilingual language models with the Qwen family and machine translation. He coauthored PolyLM in 2023 and MoE-CT in 2024, which explored multilingual training and expansion. He coauthored Qwen2 and Qwen2.5 in 2024, Qwen3 in 2025, and Qwen-Scope for mechanistic interpretability in 2026. In October 2026, he coauthored Qwen-MT-Lumen, an instruction-specialized translation system using Qwen3-14B across 23 directions, and is affiliated with Alibaba Token Hub.
Timeline
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July 2023
PolyLM multilingual model
In July 2023, he coauthors PolyLM, a multilingual language model trained on 640 billion tokens and available in 1.7B and 13B sizes.
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June 2024
MoE-CT multilingual training
In June 2024, he coauthors MoE-CT, an approach for continual large-language-model training that separates base-model learning from multilingual expansion.
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July 2024
Qwen2 technical report
In July 2024, he coauthors the Qwen2 Technical Report, which presents foundational and instruction-tuned models from 0.5 to 72 billion parameters, including dense models and a Mixture-of-Experts model.
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December 2024
Qwen2.5 technical report
In December 2024, he coauthors the Qwen2.5 Technical Report, which scales high-quality pretraining data from 7 trillion to 18 trillion tokens. The Qwen2.5 family also includes an instruction-tuned 1.5B model.
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May 2025
Qwen3 technical report
In May 2025, he coauthors the Qwen3 Technical Report, which expands multilingual support from 29 to 119 languages and dialects.
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May 2026
Qwen-Scope sparse autoencoders
In May 2026, he coauthors Qwen-Scope, an open-source suite of sparse autoencoders for mechanistic interpretability with 14 groups across seven Qwen3 and Qwen3.5 model variants.
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October 2026
Qwen-MT-Lumen for WMT
In October 2026, he coauthors Qwen-MT-Lumen, an instruction-specialized translation system built on a Qwen3-14B backbone for WMT 2026's 23 directions.
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As of October 2026
Alibaba Token Hub affiliation
As of October 2026, he is affiliated with Alibaba Token Hub.
Career
- NowAlibaba
- 2023–2026China University of Petroleum, East China
Sources and credits
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- PolyLM: An Open Source Polyglot Large Language Model
- MoE-CT: A Novel Approach For Large Language Models Training With Resistance To Catastrophic Forgetting
- Qwen2 Technical Report
- Hello Qwen2 | Qwen
- Qwen2.5 Technical Report
- Qwen/Qwen2.5-1.5B-Instruct · Hugging Face
- Qwen3 Technical Report
- Qwen-Scope: Turning Sparse Features into Development Tools for Large Language Models
- Qwen-MT-Lumen at WMT2026: Instruction-Specialized Translation via Quality-Aware Training and On-Policy Distillation
- Qwen-MT-Lumen at WMT2026: Instruction-Specialized Translation via Quality-Aware Training and On-Policy Distillation
