IBM Research Reports Learned Memory Tops τ²-Bench Service Benchmark↗ (원문, 새 창)

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In an October 20, 2026 post on Hugging Face, IBM Research reported that guidelines learned automatically from an agent's own training runs and appended to its system prompt lifted a stock GPT-4.1 customer-service agent to 67.5% Pass^4 on τ²-bench's retail domain, above every retail entry in the team's October 12, 2026 leaderboard snapshot. The result comes from ALTK-Evolve, the lab's method for building what the authors describe as a learned playbook. The method analyzes an agent's attempts on…