Mechanism: announced/experimentalTWD integration: unsupported
Meta text watermark status
Meta's open-source TextSeal toolkit can add and detect text watermarks. Meta does not say that Meta AI or released Llama services use it.
Last verified: 2026-08-17
Verification availability
What the provider publicly documents for text.
Known method
TextSeal research toolkit
Public verification
Meta does not document a public verifier for Meta AI or Llama text.
Limitations
What to keep in mind when reading a result or claim.
- Detection requires the operator's matching secret key, tokenizer, watermark configuration, and model boundary.
- TextSeal is research code for teams running their own models. It is not a public verifier for Meta AI or Llama text.
Authoritative sources
We use the provider's own documentation, announcements, and research. We do not use claims from third-party detector vendors.