The official source reports this update: v3.9.0. 3.9.0 (2026-09-05) Features api: Add prompt cache diagnostics ( #3800 ) ( 8326784 ) api: correct function argument completion event fields (openapi-545) ( #3801 ) ( 2a98f6a ) Bug Fixes api: accept incomplete web search call statuses ( #3786 ) ( 3cc8d78 ) refuse overflowing server retry delays ( #3799 ) ( 88b4d43 ) Chores api: document throttling and model overload responses — SDK-235 ( #3803 ) ( be92815 ) migrate to forked steady ( #3795 ) ( b24aeda )
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New API diagnostics and bug fixes in v3.9.0
The 3.9.0 release includes diagnostics for prompt cache and corrects function argument completion event fields.
8 Sept 20261 verified claims1 sources1 observations
This official update documents a development concerning v3.9.0. Its practical significance depends on the scope and evidence stated by the source.
Read the official source update and verify its stated scope, evidence and timing before acting on it.
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