Lossless 5-bit transformer compression. 22 architectures shipped (0.6B-405B incl. dense + MoE + SSM), 14 PPL-verified. Hermes-3-405B 1.0066x, Mistral-7B 1.00548x, Mixtral-8x7B 1.00368x. SHA-256-verifiable bit-identical reconstruction. OpenAI-compatible API at api.sipsalabs.com. pip install ultracompress
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