Tencent's Hy Memory Scores Lower Than Aura on LongMemEval, Mainly Due to Fact Extraction

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Tencent released Hy Memory 2.0, an open-source framework with a 30B memory model, and a developer tested it against Aura, their own open-source memory library. Using the public LongMemEval benchmark on three question types, Aura scored 95% overall while Hy scored 43% with a Gemini Flash writer. Most of Hy's failures were answers saying it lacked the information, and retrieving more memories did not recover it, suggesting the loss happened when conversations were converted into facts. Swapping in Claude Opus 5.5 as the writer raised Hy's knowledge-update accuracy to 9 of 10, matching Aura, though assistant-stated facts remained weak. The author disclosed a conflict of interest and reported results that went against their own product.

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