Karen Zhou is a member of technical staff at Anthropic, where she works on developing product eval, RL environments, and multi-agent product features for Claude Code. She builds evaluation systems and feedback pipelines that assess how AI models behave in real-world software development scenarios, transforming user feedback into useful evals for model improvement. On the product side, she actively worked on the development of swarm and multi-agent functionality that enables multiple AI agents to collaborate on complex software engineering tasks. Prior to Anthropic, Karen worked at Meta on large language models.