smollm2-1.7b-uc-v3-bpw5

UltraCompress is retired. Its public materials preserve historical research; new API access and paid pilots are no longer offered. Results below apply to their recorded evaluation conditions.

The public v0.6.27 CLI checks basic pack structure and computes SHA-256 fingerprints unless hashing is skipped. It does not reconstruct weights, reproduce the evaluations below, or automatically compare its fingerprint with a trusted reference.

Near-lossless 5-bit compression (~1% perplexity; lossy) of HuggingFaceTB/SmolLM2-1.7B — produced by Sipsa Labs (UltraCompress).

• Reproducible, cryptographically verifiable reconstruction: a deterministic decode to the SHA-256-pinned validated artifact (not bit-identical to the original bf16 model).
• Independently perplexity-verified end-to-end.
• License: BUSL-1.1 + Additional Use Grant.

pip install ultracompress

Documentation & verification: https://sipsalabs.com · https://github.com/sipsalabs/ultracompress

Patents pending.