MirrorCode

Epoch AI’s work is free to use, distribute, and reproduce provided the source and authors are credited under the Creative Commons Attribution license.

Citation

Tom Adamczewski, David Owen, David Rein, Florian Brand, Giles Edkins, Allen Hart, and Daniel O'Connell. ‘MirrorCode: AI can rebuild entire programs from behavior alone’. \ArXiv \[cs.AI\]\, 2026. arXiv. https://arxiv.org/abs/2606.30182.

BibTeX Citation

@misc{adamczewski2026mirrorcode, title={MirrorCode: AI can rebuild entire programs from behavior alone}, author={Tom Adamczewski and David Owen and David Rein and Florian Brand and Giles Edkins and Allen Hart and Daniel O'Connell}, year={2026}, eprint={2606.30182}, archivePrefix={arXiv}, primaryClass={cs.AI} }

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MirrorCode: What's the largest software project AI can complete on its own?

MirrorCode is Epoch AI's benchmark for long-horizon coding: AI can reimplement entire programs end-to-end, with no access to the original source code.