For AI agents: markdown of this page — /docs-content-en/changelog/2026-11-07.md documentation index — /llms.txt
API changes: November 7, 2026
FIX-1107-1: Lifecycle headers for transcription models
Before
POST /v1/audio/transcriptions ignored the model status and its replacement, although the model lifecycle rules also apply to speech recognition.
After
The endpoint follows the documented rules: a deprecated model returns Deprecation, Sunset (when a shutdown time is set), and Link / X-Model-Replacement (when a replacement is available). An available replacement serves requests to a disabled model with X-Model-Fallback, X-Model-Replacement, and X-Model-Fallback-Reason: model_disabled headers. Only a disabled model without an available replacement returns 503 model_unavailable.
Impact on integrators
No integration changes are required. The headers let integrators track model retirement and identify the model serving a request under the shared lifecycle rules.