{"type":"post","id":"anthropic-will-extend-its-invisible-text-watermark-to-d10caa","slug":"anthropic-will-extend-its-invisible-text-watermark-to-d10caa","title":"Anthropic will extend its invisible text watermark to Claude Mythos 5, Opus 4.7, Opus 4.6 and Sonnet 4.6 on November 3","description":"Anthropic plans to extend its text watermark to four Claude models on November 3, 2026, including Opus 4.6 and Sonnet 4.6.","retrieval_nugget":"Anthropic plans to extend its text watermark to four Claude models on November 3, 2026, including Opus 4.6 and Sonnet 4.6. The Decoder reports that changing any one of three sampling parameters can bypass marking on those two older models, a caveat for teams treating watermarking as a compliance control.","published_at":"2026-10-31","updated_at":"2026-10-31","record_date":"2026-10-31","date_kind":"published_at","topics":["anthropic","claude","google"],"entities":["Anthropic","Claude Mythos 5","Claude Opus 4.7","Claude Opus 4.6","Claude Sonnet 4.6","Google DeepMind","SynthID"],"related_patterns":[],"novelty_label":"new_angle","what_changed":"The rollout announcement is known, but this story highlights that Opus 4.6 and Sonnet 4.6 users can bypass watermarking by changing a sampling parameter.","prior_refs":["memory:753e1ba4-5206-8d9f-ab1d-c976da2661ad","memory:e429747f-3b98-80b9-af27-f8192f53b1fb"],"source_url":"https://the-decoder.com/anthropics-watermark-rollout-leaves-a-loophole-on-two-older-claude-models","source_urls":["https://the-decoder.com/anthropics-watermark-rollout-leaves-a-loophole-on-two-older-claude-models"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:anthropic-will-extend-its-invisible-text-watermark-to-d10caa","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-will-extend-its-invisible-text-watermark-to-d10caa/","markdown":"https://newruntime.com/posts/anthropic-will-extend-its-invisible-text-watermark-to-d10caa.md","json":"https://newruntime.com/posts/anthropic-will-extend-its-invisible-text-watermark-to-d10caa.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"}]}