AI Memory Architectures: Why MemGPT Outperformed OpenAI's Approaches

I wrote this piece after comparing different approaches to long-term memory in LLMs. Most current systems either rely on external vector databases or attempt to extend context windows, but both approaches hit scalability and efficiency bottlenecks.

MemGPT’s architecture stood out because it treats memory as a hierarchical resource: short-term scratchpad, mid-term recall buffer, and long-term persistent memory. This reduces redundant retrieval calls and improves coherence in multi-session tasks.

That raised a question for me: how do others see the trade-off between embedding-based search vs. structured memory hierarchies for scaling persistent AI agents?

FYI the LOCOMO benchmarking done by Mem0 was very sus so I wouldn't recommend relying on those numbers for anything

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