Yanda Chen
Yanda Chen is a language-model researcher whose work spans in-context learning, model explanations, and AI safety. Early studies examined language bias and cross-language retrieval, while later papers proposed methods for few-shot adaptation and tested whether explanations predict model behavior. They completed a computer-science PhD at Columbia in 2024 and coauthored Anthropic safety research on reasoning-trace faithfulness and pretraining-data filtering. As of October 2026, they are a Research Scientist on Anthropic's Code RL team, where they train Claude models toward stronger coding and agentic capabilities.
Timeline
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2019–2021
Bias research and cross-language NLP
Chen coauthors a 2019 study that tests bias in models used to flag aggression in gang-related posts. In summer 2020 and summer 2021, they intern at IBM Research and AWS AI; in April 2021, they earn a computer-science bachelor's degree at Columbia University. Their 2021 ACL paper develops cross-language sentence selection for low-resource languages with data augmentation and rationale training, and the Computing Research Association gives the work an honorable mention.
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2022
In-context tuning at ACL
Chen and four coauthors introduce in-context tuning in an ACL 2022 paper. The method recasts task adaptation and prediction as sequence prediction from instructions, labeled examples, and target inputs.
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2023–2024
A Microsoft internship and ICML work
In summer 2023, Chen interns at Microsoft Research under Chandan Singh and Xiaodong Liu. With seven coauthors, they post Do Models Explain Themselves? in 2023, proposing counterfactual simulatability to test whether explanations help people infer model outputs on changed inputs. The ICML 2024 paper finds low precision in LLM explanations, with precision uncorrelated with plausibility.
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2024
A Columbia PhD and ICL study
Chen completes a Columbia computer-science PhD in summer 2024, co-advised by Kathy McKeown, He He, and Zhou Yu. An ACL 2024 paper links language-model in-context learning to parallel phrase structures in pretraining data and finds that removing them cuts ICL accuracy by 51%.
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2025
Faithfulness and data filtering
Chen coauthors an Anthropic study in 2025 that finds chain-of-thought traces reveal hint use in fewer than 20% of examples in most tested settings. Another 2025 paper filters harmful material from pretraining data and cuts model performance on a harmful-capabilities evaluation by 33% relative to a random baseline.
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As of October 2026
Code RL at Anthropic
As of October 2026, Chen is a Member of Technical Staff (Research Scientist) on Anthropic's Code RL team, where they train Claude models toward stronger coding and agentic capabilities.
Career
- NowAnthropicResearch Scientist
- 2023Microsoft ResearchIntern
- 2021AmazonIntern
- 2020IBM ResearchIntern
Education
- 2021Columbia UniversityBachelor's degree in computer science
Sources and credits
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- Detecting and Reducing Bias in a High Stakes Domain
- Yanda Chen
- Cross-language Sentence Selection via Data Augmentation and Rationale Training
- Three CS Students Recognized By The Computing Research Association
- Meta-learning via Language Model In-context Tuning
- Do Models Explain Themselves? Counterfactual Simulatability of Natural Language Explanations
- Do Models Explain Themselves? Counterfactual Simulatability of Natural Language Explanations
- Parallel Structures in Pre-training Data Yield In-Context Learning
- Reasoning Models Don't Always Say What They Think
- Enhancing Model Safety through Pretraining Data Filtering




