LLM agents & memory systems operate in continuously updated environments (Git repos, evolving docs). They must process long contexts, recove…

LLM agents & memory systems operate in continuously updated environments (Git repos, evolving docs). They must process long contexts, recover earlier information, and reason over many updates that create interference between old and new information. How well do they handle this? We introduce MINTEval: ✅ Frequent context changes & interference (avg. 86 updates) ✅ 5 challenging question types, including long-range lookback & reasoning over multiple targets distributed across context ✅ 4 realistic domains: state tracking, multi-turn dialogue, Wikipedia revisions, GitHub commits ✅ Avg. 138.8k tokens per instance (up to 1.8M) ✅ Human verification on generated QAs = 95.6% 📊 Across 7 representative systems, MINTEval remains difficult, showing an avg. acc of 27.9%, and the best system reaches only 33.4%. 🔎 Our analysis shows: • Memory construction failures cause a 41.7% drop • Memory agents are highly sensitive to design choices • Memory systems have a strong bias toward insertion operations (76.8%) over deletion/update

Source: Jeremy Howard (X) | 2026-05-20