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Sebastian Lund

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Author of "Universal LLM Memory Does Not Exist"

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Universal LLM Memory Does Not Exist
fastpaca.comanalysisnegativeNov 25, 2025

Popular LLM memory systems like Mem0 and Zep fail to deliver promised cost and latency reductions in production, generating over 1 million tokens per test case due to LLM-on-Write architectures that spawn multiple background inference jobs.

“Author of "Universal LLM Memory Does Not Exist"”

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