Anthropic retired Claude Sonnet 4 and Claude Opus 4, and requests now return an error.

Pinned integrations on retired model IDs break immediately unless moved to the recommended Sonnet 4.6 or Opus 4.8.

This is a hard deprecation, not a quiet downgrade, so builders need to replace exact model IDs in production calls.

• Jun 16, 2026OpenAI modelcard removed API docs navigation text from the captured page.
• Jun 16, 2026Anthropic lists Claude Fable 5 and Claude Mythos 5 on its model overview.
• Jun 16, 2026Google changed the Gemini Developer API pricing page.

This is the world we build in. It moves this fast. We move with it.