OpenAI API Models gpt-5.3-codex End of Life
Support dates and upgrade guidance — rebuilt from live data.
Supported
OpenAI API Models gpt-5.3-codex is actively supported. It reaches end of life on 1 Apr 2027.
149 days of security support left
65% of this branch's supported lifetime has elapsed — 5 Feb 2026 → 1 Apr 2027.
Support timeline
Official dates from the OpenAI API Models release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 5 Feb 2026 | 9mo ago |
| Active support ended | 1 Oct 2026 | security fixes only after this |
| Deprecated support ends | 1 Apr 2027 | in 5mo |
| Latest release | — | current |
How much runway a newer branch buys
OpenAI API Models gpt-5.3-codex is the newest branch — this is the longest runway currently available.
Frequently asked questions
When does OpenAI API Models gpt-5.3-codex reach end of life?
OpenAI API Models gpt-5.3-codex reaches end of life on 1 Apr 2027 — 149 days from now. After that date it receives no security fixes.
Is OpenAI API Models gpt-5.3-codex still supported?
Yes. OpenAI API Models gpt-5.3-codex is currently maintained. Latest release: —.
What happens when OpenAI API Models gpt-5.3-codex reaches end of life?
Security fixes stop. After 1 Apr 2027 this branch receives no further updates under standard support.
How long do I have to upgrade from OpenAI API Models gpt-5.3-codex?
149 days. This is already the newest branch, so this is the longest runway currently available.
All OpenAI API Models versions
gpt-6.1-terra supported gpt-6.1-sol supported gpt-6-sol supported gpt-6-luna supported gpt-image-2.5-sunburst supported gpt-image-2.5-flare supported gpt-6-astra supported gpt-5.6-cyber supported gpt-live-transcribe supported gpt-transcribe supported gpt-5.6-luna supported gpt-5.6-terra supported gpt-5.6-sol supported gpt-live-1 supported gpt-realtime-2.1 supported gpt-realtime-2.1-mini supported gpt-realtime-2 supported gpt-realtime-translate supported gpt-realtime-whisper supported chat-latest supported gpt-5.5 supported gpt-5.5-pro supported gpt-image-2 supported gpt-5.4-mini supported gpt-5.4-nano supported gpt-5.4 supported gpt-5.4-pro supported gpt-5.3-chat-latest EOL 2026 gpt-audio-1.5 supported gpt-realtime-1.5 supported gpt-5.3-codex supported gpt-audio supported gpt-audio-mini supported gpt-5.2-codex EOL 2026 gpt-image-1.5 supported gpt-5.2 supported gpt-5.2-chat-latest EOL 2026 gpt-5.2-pro supported gpt-5.1-codex-max EOL 2026 gpt-5.1-codex EOL 2026 gpt-5.1-codex-mini EOL 2026 gpt-5.1 supported gpt-5.1-chat-latest EOL 2026 gpt-4o-transcribe-diarize supported gpt-image-1-mini supported gpt-realtime-mini supported sora-2 EOL 2026 sora-2-pro EOL 2026 gpt-5-codex EOL 2026 gpt-realtime supported gpt-5 supported gpt-5-chat-latest EOL 2026 gpt-5-mini supported gpt-5-nano supported gpt-5-pro supported gpt-oss-120b supported gpt-oss-20b supported codex-mini-latest EOL 2026 o3 supported o3-pro supported o4-mini EOL 2026 gpt-4.1 supported gpt-4.1-mini supported gpt-4.1-nano EOL 2026 chatgpt-image-latest supported gpt-image-1 EOL 2026 gpt-4o-mini-transcribe supported gpt-4o-mini-tts supported gpt-4o-transcribe supported o1-pro EOL 2026 o3-deep-research EOL 2026 o4-mini-deep-research EOL 2026 o3-mini EOL 2026 o1 EOL 2026 omni-moderation-latest supported o1-mini EOL 2025 chatgpt-4o-latest EOL 2026 gpt-4o-mini supported gpt-4o supported text-embedding-3-large supported text-embedding-3-small supported gpt-4-turbo EOL 2026 tts-1 supported tts-1-hd supported babbage-002 EOL 2026 davinci-002 EOL 2026 gpt-4 EOL 2026 gpt-3.5-turbo EOL 2026 whisper-1 supported text-moderation-latest EOL 2025 text-moderation-stable EOL 2025 text-embedding-ada-002 supported