Zyphra family complete
The Zyphra line is complete at 1BP: Zamba2 hybrid SSMs and the ZR1 reasoning model, all four converted and validated end to end on the ZINC GPU. Two architectures, one engine, and the evidence that the conversion path is general rather than tuned.
The family
The Zyphra line is now complete in the 1bit repo, and complete at 1BP precision across all four members. Two distinct architectures, one conversion pipeline, one engine. Proving the second half of that sentence was the whole point.
The four
| Model | Family | Architecture | State |
|---|---|---|---|
| Zamba2 1.2B | Zamba2 | Mamba2-hybrid | converted and validated |
| Zamba2 2.7B | Zamba2 | Mamba2-hybrid | converted and validated |
| Zamba2 7B | Zamba2 | Mamba2-hybrid | converted and validated |
| ZR1-1.5B | ZR1 | reasoning | converted and validated |
Two architectures
Zamba2 is a hybrid SSM, a Mamba2-hybrid design where a linear state-space backbone carries most of the compute and attention stays where it earns its cost. ZR1 is the reasoning model in the set, a different shape entirely. Getting both through the same engine is the actual test, because the two ask different things of the kernels underneath.
Validated end to end
All four models were converted and validated end to end on the ZINC GPU, meaning the output is checked rather than just the load. The run that sealed the set came in at 26 tok/s on Strix Halo.
Two architectures, one engine
Four models, two architectures, one engine. If the conversion path survives both a hybrid SSM and a reasoning model at 1BP, it is not tuned to one family, it is the general path, and the Zyphra set is the evidence.