{"type":"post","id":"anthropic-to-apply-its-eu-ai-act-text-985b99","slug":"anthropic-to-apply-its-eu-ai-act-text-985b99","title":"Anthropic to apply its EU AI Act text watermark to Mythos 5, Opus 4.7, Opus 4.6 and Sonnet 4.6 from November 3","description":"Anthropic is reported to be extending text watermarking to Mythos 5, Opus 4.7, Opus 4.6 and Sonnet 4.6 from November 3.","retrieval_nugget":"Anthropic is reported to be extending text watermarking to Mythos 5, Opus 4.7, Opus 4.6 and Sonnet 4.6 from November 3. For teams using those models, the change matters because generated text will carry a machine-detectable signal across Anthropic’s services, while the detection tool remains restricted and the signal is not conclusive.","published_at":"2026-11-01","updated_at":"2026-11-06","record_date":"2026-11-01","date_kind":"published_at","topics":["anthropic","claude","google"],"entities":["Anthropic","Claude","Mythos 5","Opus 4.7","Opus 4.6","Sonnet 4.6","SynthID-Text","EU AI Act"],"related_patterns":[],"novelty_label":"same_event","what_changed":"Same event as Anthropic will extend its invisible text watermark to Claude Mythos 5, Opus 4.7, Opus 4.6 and Sonnet 4.6 on November 3","prior_refs":["memory:5c344136-2b20-82a0-ae11-fe88103cddfe","memory:753e1ba4-5206-8d9f-ab1d-c976da2661ad","memory:e429747f-3b98-80b9-af27-f8192f53b1fb"],"source_url":"https://maccus.fr/en/claude-text-watermark","source_urls":["https://maccus.fr/en/claude-text-watermark"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:anthropic-to-apply-its-eu-ai-act-text-985b99","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/posts/anthropic-to-apply-its-eu-ai-act-text-985b99/","markdown":"https://newruntime.com/posts/anthropic-to-apply-its-eu-ai-act-text-985b99.md","json":"https://newruntime.com/posts/anthropic-to-apply-its-eu-ai-act-text-985b99.json"},"next_reads":[{"type":"topic","path":"/topics/anthropic/","url":"https://newruntime.com/topics/anthropic/","title":"Anthropic","reason":"Explore the anthropic topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/anthropic.md","json_url":"https://newruntime.com/topics/anthropic.json"},{"type":"topic","path":"/topics/claude/","url":"https://newruntime.com/topics/claude/","title":"Claude","reason":"Explore the claude topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/claude.md","json_url":"https://newruntime.com/topics/claude.json"},{"type":"topic","path":"/topics/google/","url":"https://newruntime.com/topics/google/","title":"Google","reason":"Explore the google topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/google.md","json_url":"https://newruntime.com/topics/google.json"},{"type":"collection","path":"/posts/","url":"https://newruntime.com/posts/","title":"Field Notes","reason":"Open the latest editorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/posts.json"},{"type":"collection","path":"/source-ledger.json","url":"https://newruntime.com/source-ledger.json","title":"Source Ledger","reason":"Inspect the public source evidence graph.","media_type":"application/json"}]}