[Point72 Sues Former Quantitative Analyst, Alleging He Used AI to Steal Code] Golden Finance reports that on November 11th, Point72 Asset Management's quantitative trading division accused a former research analyst of stealing proprietary source code from Anthropic PBC's Claude and OpenAI's Codex in an attempt to join a competitor. Cubist Systematic Strategies filed the lawsuit against Xin Jin in state court in Stamford, Connecticut, on Monday. Cubist stated in its complaint that its investigation determined Jin "attempted to steal (and likely did steal) confidential, proprietary, and competitively sensitive information," and dismissed him in September.