Living systematic review
Agent / long-term memory
Giving LLM agents persistent, retrievable memory across turns and sessions.
69 papers99 critique receipts540 benchmark resultsupdated Jun 18, 2026
Most-superseded baselines
Ranked by how many distinct papers critique or beat each method — the standard baselines newer work routinely measures against.
- 1Mem0
Mem0: Building Production-Ready AI Agents with Scalable Long-Term Memory
3 critique · 15 beaten on benchmarks
- 2A-MEMin Mem0
A-MEM: Agentic Memory for LLM Agents
5 critique · 12 beaten on benchmarks
- 3Zepin Mem0
Zep: A Temporal Knowledge Graph Architecture for Agent Memory
1 critique · 9 beaten on benchmarks
- 4Nemori
Nemori: Self-Organizing Agent Memory Inspired by Cognitive Science
2 critique · 5 beaten on benchmarks
- 5RAPTOR
RAPTOR: Recursive Abstractive Processing for Tree-Organized Retrieval
3 critique · 4 beaten on benchmarks
- 6MemGPTin RAPTOR
MemGPT: Towards LLMs as Operating Systems
4 critique · 3 beaten on benchmarks
- 7HippoRAG 2in RAPTOR
From RAG to Memory: Non-Parametric Continual Learning for Large Language Models
1 critique · 5 beaten on benchmarks
- 8MemoryOSin Mem0
Memory OS of AI Agent
2 critique · 4 beaten on benchmarks
- 9HippoRAGin RAPTOR
HippoRAG: Neurobiologically Inspired Long-Term Memory for Large Language Models
4 critique · 2 beaten on benchmarks
- 10LightMemin Mem0
LightMem: Lightweight and Efficient Memory-Augmented Generation
1 critique · 4 beaten on benchmarks
- 11Reflexion
Reflexion: Language Agents with Verbal Reinforcement Learning
3 critique · 2 beaten on benchmarks
- 12Memory-R1in Mem0
Memory-R1: Enhancing Large Language Model Agents to Manage and Utilize Memories via Reinforcement Learning
4 critique · 1 beaten on benchmarks
The competition
Methods that fight on the same benchmarks cluster into distinct sub-problems.
RAPTOR25 methods
RAPTOR · MemGPT · HippoRAG 2 · HippoRAG · MemoryBank · GraphRAG
MIRIX3 methods
MIRIX · EviMem · MemBuilder
Memento3 methods
Generative Agents3 methods
The frontier
Recent methods not yet superseded in the knowledge base.
- Jun 9, 2026
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