News
Dated items, one per development, each written the day it went live and linked to the primary source that changed. The reference pages describe the state of things; this page records when the state moved. Subscribe by RSS.
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Anthropic Lists Which Claude Models Carry the Text Watermark
Anthropic's help article now names the models with the text watermark: Fable 5.1, Mythos 5.1 and Opus 5. Older models are covered during a transition period.
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Claude's Watermark Detector Exists. Here Is Who Can Use It
Since 1 September 2026 Anthropic offers a detection API in private preview to organisations obliged under EU law. Individuals still have nothing to run.
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Claude API Files Now Carry C2PA Credentials: 14 Signed Formats
Anthropic's docs now list the 14 image, video and audio formats the Claude API signs with C2PA, and what the manifest holds. Text and PDFs are not signed.
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