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Morning Edition · Tuesday, September 8, 2026Published at 2:18 AM EDT · New York
Anthropic Watermarks Claude's Text Output by Biasing the Sampler, Not by Inserting Characters
The method builds on Google DeepMind's SynthID-Text and applies to models launched on or after 2 August, driven by transparency commitments Anthropic signed under European Union rules in July.
Anthropic published an explanation of how Claude's text watermark works. The mark is not a hidden character or an edit added after the fact. It changes the source of randomness the model uses when choosing among candidate next words, produc…
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