Claude Fable

Vendor: claude-fable-5.1, as of 29 September 2026

The top tier of Anthropic's latest Claude generation, designed for particularly demanding analysis and drafting. For everyday work the established working tiers of the family are the more proven ones. For professional secrets there is no viable route here: the platforms list this class in a model tier of its own whose terms of use make 30-day retention of inputs and forwarding to the vendor a condition of access; zero retention is excluded. That removes precisely the commitment on which the coverage of the other models rests - regardless of any contractual arrangement.

Not usable for client data

The provider excludes something section 203 requires - usually the confidentiality commitment or the purpose limitation on your inputs. With client data this route does not work.

What it is good for

Frontier tier of the Claude family - listed by the platforms in a model class of its own

Where it stops

Mandatory 30-day prompt retention and compulsory data sharing with Anthropic (Trust & Safety) - zero retention cannot be selected
Ruled out for professional-secrecy workloads on all examined routes

Status through us

The same model, procured differently, is a different legal position. The status above refers to procurement through us; processing takes place in a third country.

Which route carries it, with which instrument and under which condition, we set out in full to the firm before it commissions us - section 203(4) requires that the chain can be checked, not that it is published. The full matrix, with the sources behind every route, can be requested in the German catalogue after confirming your e-mail address, and we go through it in the conversation.

Is Claude Fable the right fit?

We go through your tasks and the route that carries them - and say plainly where it does not.

Arrange a conversation