Anthropic releases System Card for Claude Sonnet 5
The document details technical specs and safety testing for the model, which the company identifies as its most agentic Sonnet release to date. The System Card arrives alongside the general availability of Sonnet 5 for all users via the Claude interface and API.
The report covers model behavior in agentic scenarios, safety evaluations, and resilience against misuse. At the Extra High setting, Sonnet 5 matches the performance of Opus 4.8 in standard mode across the OSWorld-Verified and BrowseComp benchmarks.
The full document is available on the Anthropic website.
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