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.
-
DeepMind's Open SynthID Text Detector Now Returns a p-Value
DeepMind's open SynthID Text code replaced its weighted mean detector with an exact binomial test on 23 October 2026. It still needs the watermarking key.
-
Anthropic Moves the Bedrock Watermark Date Again, to 23 October
The footnote on Anthropic's model table for Fable 5, Opus 4.8 and Sonnet 5 now says the Amazon Bedrock rollout will complete by 23 October, not 17 October.
-
EU Code Signatories Set Up a Marking and Detection Task Force
The Commission says over 90 signatories of the EU transparency code formed two task forces on 30 September 2026, one on marking and detecting AI content.
-
OpenAI Says Its Text Detector Is Free, Not for Checking Student Work
OpenAI's help centre now says textGrain detector checks are free, access is for research organisations, and checking student work for AI use is out of scope.
-
Anthropic Moves the Bedrock Watermark Rollout Date to 17 October
The footnote on Anthropic's model table for Fable 5, Opus 4.8 and Sonnet 5 now says the Amazon Bedrock rollout will complete by 17 October, not 12 October.
-
Google Opens the SynthID Detector to Everyone, for Files Only
DeepMind's SynthID page now says anyone can check image, video and audio files from Google and partners including OpenAI, NVIDIA and Kakao. Text is not named.
-
Claude Haiku 5.5 Carries the Text Watermark From Launch Day
Anthropic's help article added Haiku 5.5 to its model table on 7 October 2026, the day it was announced, making nine text-watermarked Claude models.
-
OpenAI Announces textGrain, a Gated Text Watermark Under the EU AI Act
OpenAI's own text watermark is live as an API opt-in worldwide, reaches ChatGPT and Codex in the EU in the coming weeks, and its detector is researcher-only.
-
Claude Fable 5, Opus 4.8 and Sonnet 5 Join the Text Watermark Table
Anthropic's help article now lists eight text-watermarked Claude models, and no longer says all older models will be covered by 2 December 2026.
-
Claude Sonnet 5.5 Carries the Text Watermark, Anthropic's Table Shows
Anthropic's help article now lists Sonnet 5.5 with the text watermark and C2PA credentials, making five text-watermarked Claude models.
-
Claude Opus 5.5 Carries the Text Watermark, Anthropic's Table Shows
Anthropic's help article now lists Opus 5.5 with the text watermark and C2PA credentials, making four text-watermarked Claude models.
-
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.
-
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.
-
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.
Last verified against primary sources: