Verification is under 30 days old, not a live check; date passage does not confirm shutdown.
What changed
Impact summary
gpt-5.4-cyber was scheduled for removal from the API on Oct 1, 2026.
Affected models and systems
gpt-5.4-cyberMigration action
Source and interpretation
OpenAI direct API · Direct developer platform; eligibility and regional restrictions are account-specific.
Not Azure OpenAI.
Bounded manual catalog. Original event checks retained from 2026-09-01; not reverified in this expansion.
Unconfirmed regions are not assumed to be global. Scheduled checks cover only sources in the current monitored list. Source checks
Official evidence locators
- Upcoming deprecations → ### 2026-09-11: Transcription models → table rows whisper-1 through gpt-4o-transcribe-diarize
— Oct 1, 2026 | whisper-1 | The most capable cyber model available to you
Announcement 2026-09-11; shutdown Oct 1, 2026. Original source date and qualifier retained; exact shutdown time is not inferred.
Affected endpoints: Not separately specified; check model / capability scope
Action / deadline: Review required · Stated deadline
This record is classified as official announcement. The facts above were normalized from the provider's public developer documentation. API Change Watch does not treat an unreviewed page diff as a verified announcement.
Record revision history
- · addition ·
9498bf768133
Full before/after values are retained in the JSON export. Recording time is not announcement or verification time.