Mem0 State of AI Agent Memory 2026: New Token-Efficient Algorithm Gains +29.6 on Temporal Queries, +23.1 on Multi-Hop Reasoning

Mem0·medium signal

Mem0's industry report documents the agent memory landscape: 21 frameworks, 20 vector stores, three hosting models. Their April 2026 algorithm uses single-pass hierarchical extraction and multi-signal retrieval (semantic + BM25 + entity matching). Key finding: swapping active memory for long-context-only baseline drops task completion from 80%+ to 45% — memory architecture gains rival model scaling gains.