Anthropic — Claude Sonnet 4.5

If you are building on this model

Using a general-purpose model inside your own product generally makes you a downstream provider with obligations of your own — and those do not transfer from the model's provider. This is what the register could find of the material you would normally gather, and what to request where it could not. 1 of 5 available publicly for this model.

• ○ Training-data summary Not found here

  Article 53(1)(d) — the public summary of training content.

  Ask the provider for the public summary of training content, or its URL.

• ○ Copyright policy Not found here

  Article 53(1)(c) — the policy for complying with EU copyright law.

  Ask for the copyright policy, including how text-and-data-mining reservations are honoured.

• ● Documentation for downstream providers Found

  Article 53(1)(b) — the information you need to meet your own obligations.

  Open the document

• ○ A stated systemic-risk position Not found here

  Article 55 — changes what is expected of the model and what you should ask about.

  Ask whether the provider has notified the Commission under Article 52. No provider on this register states a position publicly.

• ○ A contact for incidents Not found here

  Somewhere to report a serious incident you observe in production.

  Establish a named contact before deployment, not after an incident.

Availability, not compliance. A blank means this register did not find the document at the sources it monitors — which may be a gap in our monitoring rather than a fact about the provider. Whether any obligation applies, and to whom, is a legal question this register does not answer.