4 sources
Useful for the attack-and-evaluation side of alignment work, especially long-context jailbreak research and the measurement work that turns safety concerns into concrete tests.
Start HereMany-shot Jailbreaking
Researcher Profile
Editor reviewedEthan Perez
Alignment via AI feedback (Constitutional AI)
Alignment and evaluation researcher at Anthropic
Important because he sits near the boundary between alignment theory and concrete failure-mode discovery, especially jailbreaks, preference training, and behavior evaluations.
Organizations
Anthropic
Labs
About This Page
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Last reviewed
March 18, 2026
Official And External Links
Known For
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01
Constitutional AI
02
Jailbreak and robustness research
03
Behavior discovery and safety evaluation
04
Alignment via AI feedback (Constitutional AI)
05
Constitutional AI: Harmlessness from AI Feedback
06
Training a Helpful and Harmless Assistant with Reinforcement Learning from Human Feedback
Start Here
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Signature Works
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Related Researchers
People worth exploring next because they share topics, labs, or source material with this profile.
4 sources
Important for understanding how Anthropic’s assistant-training stack evolved from early RLHF into Constitutional AI and later robustness work around jailbreaks and behavior control.
5 sources
A high-signal person to follow for the part of alignment research that asks whether a model’s stated reasoning can actually be trusted and measured.
5 sources
Worth tracking for the newer evaluation thread at Anthropic, especially where failure-mode discovery and faithfulness measurement extend beyond the original RLHF papers.
4 sources
A useful profile for the people building Anthropic’s evaluation stack, especially the model-written-evals line that tries to surface behaviors faster than hand-built test sets can.
5 sources
Important because he is right at the center of the model-written-evals line, which became one of Anthropic’s clearest attempts to discover behaviors faster than manual evaluation can.