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Anthropic · model release

Claude Opus 4 and Sonnet 4

Anthropic releases two new Claude models, with the Sonnet version free for everyone to use.

In detail

Anthropic released Claude Opus 4 and Claude Sonnet 4 in its paid plans, with Sonnet 4 also for free users, and on the API, Amazon Bedrock and Google Cloud Vertex AI.

Sources

  1. Introducing Claude 4 · Anthropic · Primary source

Last checked 11 November 2026.

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