{"schema_version":"onlylabs.public_signal.v1","title":"Anthropic Writing: Claude Text Watermark","description":"Anthropic writing signal with public source context, captured evidence pages, related signals, and data-business radar classification.","url":"https://onlylabs.fyi/signals/823b419c-8818-448f-8b67-1959a601d3b2","json_url":"https://onlylabs.fyi/signals/823b419c-8818-448f-8b67-1959a601d3b2/signal.json","generated_at":"2026-09-10T00:56:39.009Z","evidence_latest_fetched_at":"2026-08-14T20:02:07.093733+00:00","signal_first_seen_at":"2026-08-14T20:00:51.951739+00:00","org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab","category_label":"Frontier lab","dossier_url":"https://onlylabs.fyi/labs/anthropic","dossier_json_url":"https://onlylabs.fyi/labs/anthropic/dossier.json"},"related_urls":{"signal":"https://onlylabs.fyi/signals/823b419c-8818-448f-8b67-1959a601d3b2","signal_json":"https://onlylabs.fyi/signals/823b419c-8818-448f-8b67-1959a601d3b2/signal.json","source":"https://www.anthropic.com/news/claude-text-watermark","lab_dossier":"https://onlylabs.fyi/labs/anthropic","lab_dossier_json":"https://onlylabs.fyi/labs/anthropic/dossier.json","analysis":"https://onlylabs.fyi/analysis/anthropic","analysis_json":"https://onlylabs.fyi/analysis/anthropic/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/anthropic/evidence.json","category":"https://onlylabs.fyi/frontier","category_json":"https://onlylabs.fyi/frontier.json","category_feed":"https://onlylabs.fyi/frontier/feed.xml","category_signals_json":"https://onlylabs.fyi/signals.json","topic":"https://onlylabs.fyi/topics/talking","topic_signals_json":"https://onlylabs.fyi/topics/talking/signals.json","topic_feed":"https://onlylabs.fyi/topics/talking/feed.xml","data_business":null},"answer_pack":{"answer":"Anthropic published Claude Text Watermark. This talking signal gives public context for research themes, product direction, policy, or launch framing. High-signal details: Anthropic research on text watermarking, low HN traction · How Claude's text watermarking works \\ Anthropic Announcements How Claude’s text watermark works Aug 14, 2026 Future Claude models will generate text that contains.... onlylabs links this event to 1 captured evidence page and 6 related writing signals.","signal_desk":"talking","source_context":{"source_url":"https://www.anthropic.com/news/claude-text-watermark","source_host":"anthropic.com","occurred_at":"2026-08-14T00:00:00.000Z","first_seen_at":"2026-08-14T20:00:51.951739+00:00","date_source":"page.visible_date","context":null},"context_markers":[{"label":"Lab","value":"Anthropic","source":"signal"},{"label":"Signal desk","value":"talking","source":"signal"},{"label":"Source host","value":"anthropic.com","source":"source"},{"label":"Notability","value":"Anthropic research on text watermarking, low HN traction","source":"signal"},{"label":"HN","value":"Community is skeptical, seeing text watermarking as 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narrative layer over raw signals and helps identify which frontier-lab priorities are becoming externally legible.","required_sources":[{"label":"signal_json","url":"https://onlylabs.fyi/signals/823b419c-8818-448f-8b67-1959a601d3b2/signal.json","required":true},{"label":"source","url":"https://www.anthropic.com/news/claude-text-watermark","required":true},{"label":"dossier_json","url":"https://onlylabs.fyi/labs/anthropic/dossier.json","required":true},{"label":"analysis_evidence_json","url":"https://onlylabs.fyi/analysis/anthropic/evidence.json","required":true},{"label":"topic_signals_json","url":"https://onlylabs.fyi/topics/talking/signals.json","required":false},{"label":"data_radar_json","url":null,"required":false}],"expected_output":["one-paragraph source-grounded interpretation","category-specific implication","confidence and missing evidence","recommended next source to inspect"],"prompt_seed":"Using only the linked onlylabs JSON, captured source context, and cited evidence, 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This talking signal gives public context for research themes, product direction, policy, or launch framing. High-signal details: Anthropic research on text watermarking, low HN traction · How Claude's text watermarking works \\ Anthropic Announcements How Claude’s text watermark works Aug 14, 2026 Future Claude models will generate text that contains.... onlylabs links this event to 1 captured evidence page and 6 related writing signals.","semantic_triples":[{"subject":"Anthropic","predicate":"published","object":"Claude Text Watermark","text":"Anthropic published Claude Text Watermark."},{"subject":"Claude Text Watermark","predicate":"is classified as","object":"writing signal","text":"Claude Text Watermark is classified as writing signal."},{"subject":"Claude Text Watermark","predicate":"belongs to","object":"talking desk","text":"Claude Text Watermark belongs to talking desk."},{"subject":"Claude Text Watermark","predicate":"has evidence coverage","object":"1 captured evidence page","text":"Claude Text Watermark has evidence coverage 1 captured evidence page."}]},"signal":{"id":"823b419c-8818-448f-8b67-1959a601d3b2","url":"https://onlylabs.fyi/signals/823b419c-8818-448f-8b67-1959a601d3b2","json_url":"https://onlylabs.fyi/signals/823b419c-8818-448f-8b67-1959a601d3b2/signal.json","source_url":"https://www.anthropic.com/news/claude-text-watermark","title":"Claude Text Watermark","summary":"Anthropic published a writing signal. onlylabs watches public writing for research themes, product direction, and model-launch context.","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2026-08-14T00:00:00.000Z","first_seen_at":"2026-08-14T20:00:51.951739+00:00","date_source":"page.visible_date","evidence_coverage":{"target_pages":1,"captured_pages":1,"readable_pages":1,"capture_methods":["plain"],"missing_page_urls":[],"failed_page_urls":[],"blocked_page_urls":[],"page_urls":["https://www.anthropic.com/news/claude-text-watermark"]},"facets":{},"traction":{"github_stars":null,"hn_points":15,"hn_comments":8,"hn_story_id":"49303350","hf_downloads":null,"hf_likes":null},"data_radar":null},"primary_evidence_page":{"is_primary":true,"source_match":true,"url":"https://www.anthropic.com/news/claude-text-watermark","final_url":"https://www.anthropic.com/news/claude-text-watermark","title":"Claude Text Watermark","http_status":200,"content_type":"text/html; charset=utf-8","capture_method":"plain","fetched_at":"2026-08-14T20:02:07.093733+00:00","bytes":154343,"raw_path":"e68246067eeddf6e1d69054b26875df87dd7d6bd47ff2b0a5e4c670c0aaa6059.html","content_hash":"f27fb0b2306404b2855998e3a9020edbcee736c38349acf324379a1dbf30d09e","excerpt_chars":1200,"truncated":true,"excerpt":"How Claude's text watermarking works \\ Anthropic Announcements How Claude’s text watermark works Aug 14, 2026 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. To summarize: We use a method of watermarking that does not have any practical impact on the quality or content of Claude’s outputs; The difference between watermarked and un-watermarked text will not be distinguishable to readers; Nothing is added to the text and there are no hidden characters; Watermarking doesn’t require extra tokens, and will not be more expensive; Watermarking carries no identifying information and can’t be traced to a specific person, organization, or chat; Watermarking won’t be specific to Claude. As of August 2, the EU requires AI providers serving its market to mark AI-generated content...."},"evidence_pages":[],"related_signals":[{"id":"f6ee7530-aad8-444f-a772-290b240701ff","url":"https://onlylabs.fyi/signals/f6ee7530-aad8-444f-a772-290b240701ff","source_url":"https://www.anthropic.com/research/property-based-testing","title":"Property Based Testing","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2026-01-14T00:00:00.000Z","first_seen_at":"2026-06-17T20:00:31.646229+00:00","date_source":"page.visible_date"},{"id":"94184e59-72a9-44a0-bb78-6c9165883bbe","url":"https://onlylabs.fyi/signals/94184e59-72a9-44a0-bb78-6c9165883bbe","source_url":"https://www.anthropic.com/news/introducing-anthropic-labs","title":"Introducing Anthropic Labs","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2026-01-13T00:00:00.000Z","first_seen_at":"2026-06-09T02:17:26.339488+00:00","date_source":"page.visible_date"},{"id":"557b5559-6aa3-49d4-9dcb-ef0a333f9d24","url":"https://onlylabs.fyi/signals/557b5559-6aa3-49d4-9dcb-ef0a333f9d24","source_url":"https://www.anthropic.com/research/next-generation-constitutional-classifiers","title":"Next Generation Constitutional Classifiers","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2026-01-09T00:00:00.000Z","first_seen_at":"2026-06-09T02:17:26.339488+00:00","date_source":"page.visible_date"},{"id":"5f0f346c-0718-4d81-a174-d18cae51efa3","url":"https://onlylabs.fyi/signals/5f0f346c-0718-4d81-a174-d18cae51efa3","source_url":"https://www.anthropic.com/research/critical-infrastructure-defense","title":"Critical Infrastructure Defense","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2026-01-08T00:00:00.000Z","first_seen_at":"2026-06-17T20:00:31.646229+00:00","date_source":"page.visible_date"},{"id":"1d970590-34b3-4222-b496-5b69b7bb7869","url":"https://onlylabs.fyi/signals/1d970590-34b3-4222-b496-5b69b7bb7869","source_url":"https://www.anthropic.com/research/bloom","title":"Bloom","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2025-12-19T00:00:00.000Z","first_seen_at":"2026-06-09T02:17:26.339488+00:00","date_source":"page.visible_date"},{"id":"1c14c90a-d8e8-45d2-a32a-bd1c43e00aca","url":"https://onlylabs.fyi/signals/1c14c90a-d8e8-45d2-a32a-bd1c43e00aca","source_url":"https://www.anthropic.com/news/compliance-framework-SB53","title":"Compliance Framework SB53","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2025-12-19T00:00:00.000Z","first_seen_at":"2026-06-09T02:17:26.339488+00:00","date_source":"page.visible_date"}]}