Qwenputer: A functioning, deterministic RISC-V CPU inside Qwen3.5

Automated excerpt

A stock Qwen 3.5 4B with a RISC-V CPU compiled into its weights, running on its own Gated DeltaNet layers as RAM. Qwenputer is a pretty fun experimental model. Accuracy of base Qwen3.5-4B, Qwenputer and base Qwen with a Python tool on NUPA and DeepMind arithmetic sets div_big: Qwenputer scores 97.5%, versus 95% by giving Qwen 3.5 4B a Python tool and 72.5% for base Qwen. mul_big: Qwenputer scores 97.5%, versus 100% with a Python tool and 55% for base Qwen. mul_div_multiple_longer: Qwenputer scores 100%, versus 97.5% with a Python tool and 90% for base Qwen.

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