Learned memory pushes GPT-4.1 to the top of retail support tests
A basic GPT-4.1 customer-service agent reaches 67.5% Pass^4 on τ²-bench’s retail tasks, beating every retail entry in IBM’s leaderboard snapshot without changing model weights. ALTK-Evolve reviews past attempts, turns successes and failures into short rules, then adds those rules to the system prompt, helping the agent authenticate customers, follow policy, and take the right tool actions. Pass^4 means it solves a task on all four independent attempts.