Paper: sub-1.5bpe entropy-coded frontier + NIAH cliff + 2nd-arch HQMQ comparison#41
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…th NIAH cliff confirmation; extend HQMQ comparison to second architecture
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Adds the measured sub-1.5bpe frontier across Mistral-Inst-v0.3, Llama-3.1-Inst, and Qwen3-8B (paired AQUA-iso PPL + live zstd/Shannon/rANS entropy-coded bpe), showing a sharp key-bit cliff: entropy-coded K2V2 (~1.1 bpe) is the last deployable point, K2V1 is borderline, and 1-bit keys collapse (Mistral +31.7%, Llama +363%). A Mistral 4K NIAH table confirms the PPL cliff (K2V2 5/5, K2V1 4/5, K1V2 0/5). Extends the HQMQ iso-bpe comparison to a second architecture (Qwen3-8B). All cells independently verified against the source result JSONs; compiles clean (0 errors, 86pp). Only the compiled PDF changes.