Anthropic Researcher Builds Compiler Using Agent Teams

Nicholas Carlini of Anthropic detailed an experiment using 16 Claude (Opus 4.6) agent instances to build a Rust-based C compiler capable of compiling Linux 6.9, reporting nearly 2,000 Claude Code sessions, 2 billion input tokens, and roughly $20,000 in API costs. The 100,000-line compiler builds many projects but produces inefficient, non-drop-in code, raising verification and provenance concerns for autonomous development.
Scoring Rationale
Demonstrates novel, high-impact autonomous coding capability but limited by cost, quality issues and verification concerns in real-world deployment.
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Sources
- Read OriginalClaude Opus 4.6 spends $20K trying to write a C compilertheregister.com


