# StructMem: Why Flat Memory Breaks on Long Conversations - and How Hierarchical Design Fixes It

> Flat memory plateaus at 60 entries. Graph memory costs 18x more tokens. StructMem from Zhejiang University and Ant Group finds the middle ground - hierarchical event binding with cross-event consolidation hits 76.82% on LoCoMo with only 1,056 API calls.

Canonical URL: https://kravhal.kcsatish.com/insights/week-16
Edition: Week 09 · April 2026
Tags: Deep Learning, LLMs, Agents, RAG
Reading time: 8 min read

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