Retrieve Message Batch results changedapi/messages/batches/results
Nearest release: v2.1.306, published under an hour before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
Recorded here
Lines+28added
Lines−0removed
From line
838
where the diff opens
First seen
14 Aug 2026
this site's first read of the page
Recorded edits20to this page, all time
The whole hunk
from line 838, old and new numbered
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from line 838
838838
839839 - `CacheMissModelChanged object`
840840
841 A `cache_miss_reason` for a request whose `model` or `speed` differs from the previous request's.
842
843 See the [cache diagnostics guide](https://platform.claude.com/docs/en/build-with-claude/cache-diagnostics?sdk_languages=http#cache-miss-reason-types) to learn what to change for each reason.
844
841845 - `type: "model_changed"`
842846
843847 default: model_changed
from line 852
848852
849853 - `CacheMissSystemChanged object`
850854
855 A `cache_miss_reason` for a request whose `system` differs from the previous request's.
856
857 See the [cache diagnostics guide](https://platform.claude.com/docs/en/build-with-claude/cache-diagnostics?sdk_languages=http#cache-miss-reason-types) to learn what to change for each reason.
858
851859 - `type: "system_changed"`
852860
853861 default: system_changed
from line 866
858866
859867 - `CacheMissToolsChanged object`
860868
869 A `cache_miss_reason` for a request whose `tools` differ from the previous request's, for example because tools were added, removed, or reordered.
870
871 See the [cache diagnostics guide](https://platform.claude.com/docs/en/build-with-claude/cache-diagnostics?sdk_languages=http#cache-miss-reason-types) to learn what to change for each reason.
872
861873 - `type: "tools_changed"`
862874
863875 default: tools_changed
from line 880
868880
869881 - `CacheMissMessagesChanged object`
870882
883 A `cache_miss_reason` for a request whose `messages` differ from the previous request's in an earlier entry, instead of only having entries appended. The `model`, `system`, and `tools` match.
884
885 See the [cache diagnostics guide](https://platform.claude.com/docs/en/build-with-claude/cache-diagnostics?sdk_languages=http#cache-miss-reason-types) to learn what to change for each reason.
886
871887 - `type: "messages_changed"`
872888
873889 default: messages_changed
from line 894
878894
879895 - `CacheMissPreviousMessageNotFound object`
880896
897 A `cache_miss_reason` for when the API doesn't have a stored record of the request that `diagnostics.previous_message_id` references.
898
899 This doesn't mean that this request changed.
900
901 See the [cache diagnostics guide](https://platform.claude.com/docs/en/build-with-claude/cache-diagnostics?sdk_languages=http#cache-miss-reason-types) to learn what to change for each reason.
902
881903 - `type: "previous_message_not_found"`
882904
883905 default: previous_message_not_found
884906
885907 - `CacheMissUnavailable object`
908
909 A `cache_miss_reason` for when the API can't give a diagnosis. The request itself was processed normally.
910
911 This includes a request whose `model`, `system`, and `tools` match the previous request's but whose other prompt-affecting parameters, such as `thinking` or `tool_choice`, differ.
912
913 See the [cache diagnostics guide](https://platform.claude.com/docs/en/build-with-claude/cache-diagnostics?sdk_languages=http#cache-miss-reason-types) to learn what to change for each reason.
886914
887915 - `type: "unavailable"`
888916
No line in this hunk matches that.