Auto-Architecture: Karpathy's Loop, pointed at a CPU

In plain words

Auto-Architecture is a CPU-focused tool that implements Karpathy's Loop, an iterative system for automated design optimization. It targets developers and engineers who need to refine computational architectures through repeated cycles of building, testing, and improving. The tool runs directly on CPU hardware, making it accessible without specialized accelerators. It was launched on GitHub as an open-source project.

written from the facts on this page · September 2026

From the sources

What happens when you take an autonomous research loop out of its comfort zone and aim it at a domain it has no business being good at? Andrej Karpathy's autoresearch showed that a coding agent, given two days and a single-GPU nanochat, finds 20 training-time optimizations on its own. The recipe is general — propose, implement, measure, keep the wins — but the demonstration was inside the agent's home turf: Python, gradient descent, well-known knobs. I wanted to know if it generalized. So I pointed it at a CPU. auto-arch-tournament is a 5-stage in-order RV32IM core in SystemVerilog — the textbook pipeline you'd write in a graduate architecture class. No caches, no branch predictor, no…from github.com

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