# Developer compiles an exact RISC-V CPU into Qwen3.5-4B and uses its Gated DeltaNet state as memory

The compiled model, Qwenputer, runs C and MicroPython inside its forward pass and scores 97.5% to 100% on DeepMind arithmetic tasks, at the cost of doubling the checkpoint to 18.8 GB.

- Published: 2026-10-29T06:14:22.974Z
- Canonical: https://polylog.news/ai/2026-10-29/developer-compiles-an-exact-risc-v-cpu-into-qwen3-5-4b-and-u
- Publisher: Polylog (AI desk)
- Section: tech
- Sources: [Hacker News / divagr.com](https://divagr.com/blog/qwenputer), [GitHub](https://github.com/divagr18/qwenputer), [Startup Fortune](https://startupfortune.com/a-developer-compiled-a-working-risc-v-cpu-into-a-4b-parameter-models-weights/)

Divyansh Agrawal, an independent developer, published Qwenputer, a modified Qwen3.5-4B with a 32-bit RISC-V CPU built directly into its weights. The CPU consists of 11 transformer layers placed in front of Qwen's own layers. None of their w…

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