Canonical AI event

API 4.59.0 adds service-account API key expiration fields.

The 4.59.0 release includes API key expiration fields for service accounts. It also documents throttling and model overload responses.

8 Sept 20261 verified claims1 sources1 observations

What happened

The official source reports this update: v4.59.0. 4.59.0 (2026-09-08) Features api: Add prompt cache diagnostics ( #975 ) ( b9b9c85 ) api: add service-account API key expiration fields ( #979 ) ( af2c32a ) api: correct function argument completion event fields (openapi-545) ( #978 ) ( 198a7bd ) Chores api: document throttling and model overload responses — SDK-235 ( #980 ) ( 5356310 )

Why it matters

This official update documents a development concerning v4.59.0. Its practical significance depends on the scope and evidence stated by the source.

What to watch next

Read the official source update and verify its stated scope, evidence and timing before acting on it.

Connected knowledge