LLM Research & News October 25, 2026 IBM's 67.5% Is Not a Weight Update Unite.AI Oct 20: IBM retail agent 67.5% Pass^4 on τ²-bench, $0.1084 a conversation. No weight update. MemoraX has 10 NeurIPS papers. A PR is not a fine-tune. IBMtau2-benchLLM agents