This page may contain stale information. Last updated: 2026-08-15
Definition
SynthID-Text is Google DeepMind’s statistical watermarking method (Nature paper, 2024) that subtly biases low-stakes token choices during generation, creating a machine-detectable signature without altering meaning. anthropic adopted a version for future claude text outputs under eu-ai-act compliance.
Key Points
- Influences inconsequential word choices via alternate randomness source — detectable with a digital key
- 2026-08-14: Anthropic applies globally at launch (no durable regional scoping yet)
- Not proof of authorship — summarization/translation may retain watermark; heavy rewrites may erase it
- Detection API planned; independent researchers remain skeptical of robustness vs evasion (content-watermarking)