Claude models land on Google Cloud: IAM governs access, Marketplace bills, and Opus 5.5 fast mode comes along

Developers can now call the Anthropic-operated Claude API from inside their own Google Cloud project instead of working around the cloud account system. Previously there was no such managed channel between the Claude API and a Google Cloud project, so permissions and billing had to be handled separately. The release notes name the channel Claude Models on Google Cloud (Anthropic managed) and state that Google Cloud IAM controls access and Google Cloud Marketplace handles billing.

Onboarding reuses Google Cloud's existing identity and settlement machinery, so callers do not maintain a separate credential and payment path for Claude. Permission checks go to Google Cloud IAM and charges go to Google Cloud Marketplace, both components already present in a Google Cloud project. The release notes list IAM access control and Marketplace billing together and note that the API is operated by Anthropic.

Latency-sensitive workloads can use fast mode for Claude Opus 5.5 on the same managed channel. Fast mode had been offered on the Claude API as a research preview and now extends to the Google Cloud managed channel. The October 22 entry states that fast mode is available for Claude Opus 5.5 on Claude Models on Google Cloud (Anthropic managed).

The scope is the Claude Models on Google Cloud (Anthropic managed) channel: the API is operated by Anthropic, access is controlled through Google Cloud IAM, billing runs through Google Cloud Marketplace, and fast mode applies to Claude Opus 5.5 on that channel. The intended readers are developers and platform teams already running services in Google Cloud projects who need model calls inside existing permission and procurement processes. The release notes give no regions, prices or migration steps for the channel.

The release notes state only that the channel has launched and that fast mode is available, with no performance, latency or cost comparisons. Fast mode on Claude Opus 5.5 no longer requires requesting access, but the notes say fast mode for Claude Opus 5 and Claude Opus 4.8 remains in research preview and still needs the beta header. Regions and pricing for the channel are not given in the entry.