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Morning Edition · Sunday, October 25, 2026Published at 2:22 AM EDT · New York
Claude produced assembly-level crash-freedom proofs for 239 entry points across 123 OSS-Fuzz libraries
Anthropic and the startup Theorem turned existing fuzz harnesses into formal specifications, generated about 180 million lines of Rocq proof and found bugs that years of fuzzing missed, though the proofs cover only single-threaded static RISC-V binaries.
Anthropic and Theorem used Claude to build formal proofs that compiled code does not crash, AI ML Big Data reported. The researchers started from compilable fuzz tests in Google's OSS-Fuzz service and converted each harness into a formal sp…
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Part of a tracked trend
Language Models Make Formal Verification Cheap
Language models keep lowering the cost of machine-checked proofs, so formal guarantees spread from small, hand-verified kernels into ordinary production libraries and become a recurring security and procurement standard.
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More from this edition
- Moonshot's Kimi K3.1 Pro comes within a point of Claude Opus 5.5 on Terminal-Bench 4.0, with open weights due by November 4
- Anthropic's draft listing filing commits it to $518 billion of computing over a decade, most of it non-cancelable
- Meta's free cash flow turns negative for the first time since its 2012 listing as AI capital spending rises
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- Anthropic opens tiered access to its strongest cyber models as Moonshot strips hacking data from its open release
- OpenAI's in-house storage platform passes 500 petabytes and 70 million requests a second as the company plans for exabyte scale
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