Elvis Saravia recommends FrontierMemory, a Letta benchmark for agent memory

Elvis Saravia recommends FrontierMemory, a benchmark from Letta that measures agent memory through downstream task performance rather than recall.

He says agent memory is largely unsolved and that Opus 5.5 ranking first is not a surprise, while open-weight GLM-5.3 performing strongly on memory generation is exciting. He also asks how better memory systems could translate into more performant, efficient recursive self-improvement agents and harnesses.