Zyphra/Zamba2-1.2B-Instruct-v2 (Apache-2.0) converted to 1BP — the single-file model format used by 1bit.systems's inference engine.

1BP packs everything a loader needs into one memory-mappable file: a 256-byte header with model config, a variable-length tensor index, and Q4NX-tiled (32x256, 4-bit groups of 32 with bf16 scale/zero-point) weight data.

Architecture: Mamba2-hybrid state-space (attention interleaved every 6th layer)

Converted from zamba2-1.2b-instruct-v2-q8_0.gguf (Q8_0/BF16 source, not a 4-bit GGUF, to avoid compounding quantization error through a second 4-bit pass). Structurally verified against the source GGUF (exact tensor/element count match) and numerically verified (dequantized values within expected 4-bit quantization tolerance of the reference).

Base model: Zyphra/Zamba2-1.2B-Instruct-v2, Apache-2.0. This repo contains a re-quantized (Q4NX, 4-bit) derivative in a different on-disk format; the original license terms apply to the underlying weights.