Cache diagnostics is out of beta on the Claude API and no longer requires the cache-diagnosis-2026-04-07 beta…
Anthropic · platform.claude.com/docs/en/release-notes/overview#septembe…
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Cache diagnostics is out of beta on the Claude API and no longer requires the cache-diagnosis-2026-04-07 beta header. Include the diagnostics object on a Messages request to opt in; requests that still send the header work as before. Respo…