Kmemo 2.0 Released with Verifier Benchmarks and GPTCache Comparison

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Kmemo 2.0, a semantic cache designed to prevent incorrect responses from large language model calls, has been released with answers to two previously unresolved questions from its initial launch. The update introduces measured performance data showing that an optional cross-encoder verifier reduces false hits from around 29–32% down to 5–7%, though at the cost of dropping cache hit rates for genuine rephrasings. A head-to-head comparison against GPTCache reveals that Kmemo's guard-only mode produces more false positives than GPTCache's ONNX cross-encoder, but when both systems incur a model inference cost, Kmemo's combined guards-plus-verifier approach achieves lower false-hit rates on both test corpora. The developer also disclosed a bug in GPTCache's evaluation wrapper that silently returns zero on internal failures, which would have falsely made GPTCache appear perfect without a functional verification step in the test harness. Full benchmark results, including figures where Kmemo underperforms, are published in the project's README.

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