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Anthropic's Claude introduces automatic code verification and mathematical safety proofs

1 reports1 sources10/23/2026 updated

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Anthropic has added automatic mathematical verification to Claude, allowing it to prove the safety of generated code, though results are limited by strict conditions. The system translates crash tests into mathematical problems and analyzes compiled machine code to generate proofs, supporting specific processor architectures, single-threaded programs, and inputs under 64 MB. Verification is costly, requiring billions of tokens per proof, and the feature currently works only partially in the Opus 5.5 model, successfully solving roughly half of all proof tasks.

Written with AI from the reporting · updated 10/23/2026

Latest developmentOct 23, 19:32
Anthropic's Claude automatically proves existing code correctness using mathematical verification
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  1. 1Unclassified fact stationOct 23, 20:09single sourcereport-time onlyrevised

    Claude 自动验证代码安全

    Read original source ↗ The DecoderReplay this moment in the explorer
    Evidence & revisions · 1 source records
    Subject：
    anthropic
    Action：
    发布 Claude 代码验证功能
    Object：
    现有软件代码
    Occurred (fact side)：
    not recorded
    The Decoder ↗Report pageRevision 2 · currently revised
    Published (valid side)：
    Oct 23, 19:32
    First seen (known side)：
    Oct 23, 20:09
    Fact stationSingle source · one-sided claimRevisedReport-time only

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Oct 23
  1. The DecoderRelated fact: single sourceFact occurrence time unverifiedSource report revised
    Anthropic's Claude automatically proves existing code correctness using mathematical verification

    Report first recorded Oct 23, 20:09

    Anthropic's Frontier Red Team, partnering with Theorem, used Claude to mathematically prove the correctness of existing software by translating crash tests into mathematical problems and analyzing compiled machine code. This process generated roughly 180 million lines of mathematical proof code from 123 open-source libraries in Google's OSS-Fuzz project. The independent verification program Rocq checks these proofs, and Anthropic claims the process requires almost no human reviewers. Claude found bugs missed by years of testing, such as security bugs in a PDF reader equivalent to a year's worth, and a decade-old logical error. However, the proofs are limited to strict conditions: a specific processor architecture, single-threaded programs, and inputs under 64 MB.

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