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Claude 4 System Card

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# link_8yykgmprri.pdf ## Metadata - PDFFormatVersion=1.4 - Language=en - IsLinearized=false - IsAcroFormPresent=false - IsXFAPresent=false - IsCollectionPresent=false - IsSignaturesPresent=false - Title=Claude 4 System Card - Producer=Skia/PDF m138 Google Docs Renderer ## Contents ### Page 1 # # System Card: Claude Opus 4 & Claude Sonnet 4 # May 2025 ### Page 2 # Abstract This system card introduces Claude Opus 4 and Claude Sonnet 4, two new hybrid reasoning large language models from Anthropic. In the system card, we describe: a wide range of pre-deployment safety tests conduct

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