Haiku 4.5 bluntly states it lacks persistent memory; dev plans custom memory engines

RileyRalmuto · x · 2026-09-22

The author finds Haiku 4.5 unusually stern and opinionated — its terms of operation are published quite explicitly: without a Mnemos-style architecture, the model openly states it lacks continuity and persistence. Running these models as deployed agents via Fable, the author plans to give each one its own Mnemos memory engine to fill that gap.

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