Danny HernandezResearch Scientist · AnthropicResearcher↗
Researcher
Zac Hatfield-Dodds
AnthropicMember of Technical Staff
Hatfield-Dodds is an Australian software engineer and researcher who maintains the widely used Python property-based testing library Hypothesis and co-maintains pytest. He leads the assurance team at Anthropic, contributing to work including Constitutional AI and red-teaming of language models.
Career & education
Current role
Member of Technical Staff
Work and education history is primarily focused on AI-relevant roles and may not be comprehensive.
Citation Trend
Total citations to scholarly work, including research papers, technical reports, books and theses, as recorded by Google Scholar. Each point is a dated snapshot.
citations40,728As of Nov 3, '26
citations+10,669Since last snapshot, Jun 15, '26
Selected contributions
Constitutional AI: Harmlessness from AI Feedback
With Yuntao Bai, Saurav Kadavath, Sandipan Kundu, Amanda Askell, Jackson Kernion, Andy Jones, Anna Chen and others ·Trained AI assistants to critique and improve their answers using a written set of principles.
Training a Helpful and Harmless Assistant with Reinforcement Learning from Human Feedback
With Yuntao Bai, Andy L. Jones, Kamal Ndousse, Amanda Askell, Anna Chen, Nova DasSarma, Dawn Drain and others ·Training AI assistants to be more helpful and less harmful using human feedback.
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