# Developer builds Qwenputer, embedding a RISC-V CPU inside Qwen3.5-4B

> Original title: Qwenputer 问世：把 RISC-V CPU 指令集塞进模型，AI 算数不再靠外部工具

- Source: IThome · AI
- Published: 2026-10-30T06:12:50.000Z
- Bad Influence: https://badinfluence.news/items/pbpomb46xqd1d54gxc47ew78r
- Original: https://www.ithome.com/1/020/059.htm

## Summary

Developer Divyansh Agrawal released Qwenputer, an experimental model built on Alibaba's Qwen3.5-4B that embeds a 32-bit RISC-V CPU and memory into the network. It raised large-integer multiplication accuracy from 55% to 97.5% and scored 100% on the NUPA long-arithmetic benchmark, versus 48.6% for the base model. The model grows to about 18.8GB and runs slower, and it requires a dedicated driver. It is open-sourced on Hugging Face and GitHub and runs on a single 24GB GPU.