Claude Platform release notes

Anthropic has released Claude API version 2026-10-21, with a migration guide. New major versions of the SDKs (Python 2.0, TypeScript 1.0, Go 2.0, Java 3.0, etc.) and of the ant CLI use it by default; they include breaking changes and move from the MIT licence to Apache 2.0. On 22 October Anthropic also launched Claude Models on Google Cloud, an Anthropic-operated API accessed and billed through Google Cloud.

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