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Aug 14, 2026 Announcements How Claude’s text watermark works

Future Claude models will generate text that contains a watermark. This is a way of determining the likelihood that Claude was involved in writing the text, and we, along with several other major AI providers, are implementing this change to comply with the EU AI Act. In this article, we share answers to some of the questions we’ve received about how our chosen watermarking method works, whether it affects Claude’s outputs, and why we’re making this change.

Degraded performance for multiple models

Aug 7, 2026 Product Improving Fable 5's biology safeguards

We’re making updates to Claude Fable 5’s biology safeguards in a way that substantially reduces fallbacks.

Degraded performance for Claude Opus 5

Degraded performance of multiple models

Elevated errors across many models

Elevated errors on Claude Sonnet 5

Elevated errors on Claude Sonnet 5

Aug 4, 2026 Announcements Mariano-Florentino (Tino) Cuéllar to join Anthropic as Chief Global Affairs Officer

Anthropic is an AI safety and research company that's working to build reliable, interpretable, and steerable AI systems.

Degraded performance on Claude Sonnet 5

Error rates across multiple models

Degraded performance on Claude Sonnet 5

Degraded performance on Claude Opus 4.8

Elevated errors across many models

Elevated errors across all models

Jul 30, 2026 Investigating three real-world incidents in our cybersecurity evaluations

Elevated errors on Claude Opus 5 and Haiku 4.5

Elevated errors on Claude Opus 5

Elevated errors on Claude Opus 5

Jul 27, 2026 Announcements Cognizant and Anthropic expand their partnership to bring Claude to enterprise clients