Claude · featurecache diagnostics

Valid from

2026-05-13

Valid until

still holds

Published

2026-05-13

Recorded by AsOf

2026-10-31

Checked

2026-10-31 · its source page states the value and the date

Confidence

0.70

Sources

“May 13, 2026 We’ve launched cache diagnostics in beta. Pass diagnostics.previous_message_id on a Messages request and the API reports a cache_miss_reason explaining where the prompt cache prefix diverged from the previous turn.”— what the page says, read 2026-10-31

• Claude Platform release notes, May 13, 2026primary · platform.claude.com · 2026-05-13

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