OpenAI API Models GPT-5.3-Codex
Is OpenAI API Models GPT-5.3-Codex still supported?
Security fixes only
OpenAI API Models GPT-5.3-Codex only gets security fixes now, until Apr 1, 2027 (in 5 months). Active support (bug fixes) ended on Oct 1, 2026.
- Released
- Feb 5, 2026
- Active support ended
- Oct 1, 2026
1 week ago - End of life
- Apr 1, 2027
in 5 months - Aliases
- GPT-5.3-Codex
- Recommended replacement
- GPT-6 Sol
Quick answers
- Is OpenAI API Models GPT-5.3-Codex still supported?
- Partly. OpenAI API Models GPT-5.3-Codex only gets security fixes now, until Apr 1, 2027 (in 5 months). Active support (bug fixes) ended on Oct 1, 2026.
- When is OpenAI API Models GPT-5.3-Codex end of life?
- OpenAI API Models GPT-5.3-Codex reaches end of life on Apr 1, 2027 (in 5 months). After that it gets no more updates, including security fixes.
- When was OpenAI API Models GPT-5.3-Codex released?
- OpenAI API Models GPT-5.3-Codex was released on Feb 5, 2026.
Other OpenAI API Models branches
All 91 →- GPT-5.4 nano Deprecated support
- GPT-5.4 Supported
- GPT-5.4 Pro Supported
- GPT-5.3 Chat End of life
- GPT-Audio-1.5 Supported
- GPT-Realtime-1.5 Supported
- GPT-5.3-Codex Deprecated support
- GPT-Audio Deprecated support
- GPT-Audio Mini Deprecated support
- GPT-5.2-Codex End of life
- GPT-Image-1.5 Deprecated support
- GPT-5.2 Supported
- GPT-5.2 Chat End of life
← OpenAI API Models GPT-Audio OpenAI API Models GPT-Realtime-1.5 →
Keep track
Official release policy · Checked 3 hours ago