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Changelog

Notable changes to the API surface, models and documentation.

Model ids are pinned. A published id keeps its behaviour; new versions arrive as new ids, and retirements are announced here before they take effect.

Documentation

Full docs site published: getting started, API reference, tool and integration guides, SDK examples, billing and resources.
Every page now serves a Markdown mirror at the same path with a .md suffix, plus copy-for-LLM and ask-in-an-assistant actions.
llms.txt and llms-full.txt extended to cover the docs tree.

/v1/messages — Anthropic Messages format, streaming and tool use.
/v1/chat/completions — OpenAI Chat Completions format against the same models.
/v1/models — model discovery.
Machine-readable schema at /openapi.json.

The current catalog is always listed on Models and served live from /v1/models. Treat the endpoint as authoritative over any documentation page.