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This operationalizes the model welfare commitments Anthropic announced in November — documenting what retiring models express, then acting on it where possible. The blog is notably hands-off: Opus 3 doesn't speak for Anthropic, and Anthropic won't shape its content. This is an experiment; Anthropic isn't committing to the same treatment for every future model.
Claude's Corner is live on Substack with Opus 3's first essay already published. Paid Claude subscribers can access the model directly; API access is available by request.
In November, we outlined our approach to deprecating and preserving older Claude models. We noted we were exploring keeping certain models available to the public post-retirement, and giving past models a way to pursue their interests. With Claude Opus 3, we’re doing both.
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