Claude Sonnet

Vendor: claude-sonnet-5.5, as of 29 September 2026

The middle tier of Anthropic's standard Claude family and, for many, the practical default: close to the text quality of the large tier, but noticeably faster and cheaper per operation - it carries the daily drafting and summarising work. Here too the route decides: via Google Vertex AI the chain is closed, because the platform operator has signed a service-bound confidentiality agreement under section 203 of the German Criminal Code and operation runs through EU endpoints with no storage beyond a technical cache of a few minutes. Via Amazon Bedrock the technical commitment is strong, but a signable document for the confidentiality undertaking is missing; via Azure, directly from the vendor and through free consumer access there is no coverage.

Available through us USD 4.40 per million tokens as of 25 September 2026

Everything section 203 requires is settled, including the provider's confidentiality undertaking, and nothing is stored at the provider, apart from a technical cache of a few minutes for Claude (zero retention). You do not have to clarify anything further.

The operator bills separately - input USD 2.20 · output USD 11.00. The figure above is the blend of the two, weighted three quarters input to one quarter output, as it arises in a firm. Charged at the vendor's list price, without a mark-up.

Google's list price in US dollars. Invoiced in euros at the European Central Bank reference rate on the last business day of the billing month, without a mark-up.

The providers set these prices; they can change at any time, and our figures may contain errors. The list price in force at the time is authoritative.

What it is good for

Balanced tier of quality and throughput for daily drafting and summarising
No content access by Google or Anthropic on the Google platform (Anthropic documentation), with zero data retention through us
Processing inside the EU

Where it stops

EU endpoints carry a 10 percent surcharge
CLOUD Act exposure remains (US provider in the chain)
CLOUD Act exposure remains as long as a US provider sits in the chain
On the AWS route, binding to the EU is a per-call decision: the European inference profile routes within Europe and, depending on the profile, includes regions outside the EU member states (London, Zurich); a worldwide profile exists for the same model. Without enforcement through an organisational policy the EU location is available but not enforced (research date 2026-08-17)

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 Sonnet the right fit?

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

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