OpenAIAnthropicGooglexAIPerplexity
← Back to all updatesPublished ·Anthropic• Minor
Anthropic retired Claude Sonnet 4 and Claude Opus 4, and requests now return an error.
The read
Pinned integrations on retired model IDs break immediately unless moved to the recommended Sonnet 4.6 or Opus 4.8.
The frame
This is a hard deprecation, not a quiet downgrade, so builders need to replace exact model IDs in production calls.
Primary source
Anthropic →Keep reading
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