Mechanism: unavailableTWD integration: unsupported
Anthropic text watermark status
Anthropic says it continues to explore watermarking, but it does not document a deployed text watermark for Claude.
Last verified: 2026-08-17
Verification availability
What the provider publicly documents for text.
Known method
No documented text watermark method
Public verification
Anthropic does not document a public watermark verifier for Claude text.
Limitations
What to keep in mind when reading a result or claim.
- There is no documented Anthropic text watermark for Text Watermark Detector to verify.
- Research and future commitments do not describe how Claude text works today.
Authoritative sources
We use the provider's own documentation, announcements, and research. We do not use claims from third-party detector vendors.