Sakura Micro Bonsai 2 GSQ-RCO

Sakura Micro Bonsai logo

Sakura Micro Bonsai 2 GSQ-RCO is an experimental ultra-low-bit derivative of Prism ML's Ternary Bonsai 2 27B, itself derived from Qwen3.8-27B. This release applies GSQ/RCO-based mixed-codec allocation and additional low-bit compression.

Provenance / Base model

Sakura Micro Bonsai 2 GSQ-RCO is derived from Prism ML's Ternary Bonsai 2 27B, which identifies Qwen3.8-27B as its base model.

Release artifact

Sakura-Micro-Bonsai-2-GSQ-RCO-5.3GiB.gguf

  • Size: 5,686,593,888 Bytes (5.296 GiB)
  • SHA-256: 5054d9b3b3b95145ebf1def33803fd93a1962dda37ca50bd53dbcbbbe4655eb3
  • The bundled SHA256SUMS file can be used to verify the downloaded GGUF.

Benchmark comparison

Metric Ternary Bonsai 2 PTQ1 reference Sakura Micro Bonsai 2 GSQ-RCO
File size 5.538 GiB 5.296 GiB
WikiText-2 PPL 10.2726 10.7251
Arithmetic 34/40 (85.0%) 37/40 (92.5%)
GSM8K 38/40 (95.0%) 35/40 (87.5%)
HumanEval 16/20 (80.0%) 15/20 (75.0%)
IFEval 9/12 (75.0%) 12/12 (100%)

Sakura Micro Bonsai 2 GSQ-RCO is 4.37% smaller than the 5,946,648,928-Byte Ternary Bonsai 2 PTQ1 reference. These are measurements on small benchmark subsets, not a claim of general quality superiority over the base model.

Compression approach

The project combines several ideas rather than applying one uniform quantizer to every tensor. It uses GSQ/RCO-based mixed-codec allocation and additional low-bit compression to target a smaller release artifact while retaining measured functionality.

This card intentionally does not disclose per-tensor selections, allocation details, internal optimization logic, or reproduction procedures.

Notes

  • Experimental low-bit release.
  • Use the runtime documented by the base model.

License

Apache-2.0. The license text is included in LICENSE.

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