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What's the largest software project AI can complete on its own?
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Overview
MirrorCode is a benchmark designed to evaluate AI models on long-horizon coding tasks by requiring them to reimplement entire programs end-to-end without access to the original source code. Solutions generated by AI must match the output of the original program to be considered successful.
Summary from epoch.ai.
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Hacker News · epoch.ai
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Based on 5 sampled comments from this thread. Analyzed 2026-08-04.
- Praise: Claude is impressively capable, handling a clone of Bash in Rust with over 2600 commits — a testament to its potential for real software projects.
- Praise: Some users find AI like Codex can efficiently produce software with reasonable line counts, proving its utility in project development.
- Concern: There's a lot of skepticism around AI-generated software, with many experiences leading to messy, duct-taped architectures that don't hold up over time.
- Concern: Users frequently encounter frustrating issues, like getting stuck in loops or producing nonsensical output, requiring constant human oversight to correct.
- Concern: The claim that AI can develop new software is questioned, as many believe reproducing existing solutions doesn't translate well to innovation.