qwen3-235b-a22b-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.

Recorded CLI demo

pip install ultracompress
uc try sipsa-qwen3-0.6b

Without an API key, this prints a recorded reference response. It does not make a live inference request or demonstrate this card's model. uc catalog lists historical entries and tier labels, not current offers.

Near-lossless 5-bit compression (~1% perplexity; lossy) of Qwen/Qwen3-235B-A22B — 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.
• PPL ratio vs bf16: 1.00377× (FineWeb-edu held-out tail, seq_len=1024, seed=42, n=30 prompts).
• License: BUSL-1.1 + Additional Use Grant.

pip install ultracompress

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

Patents pending.