GPT-5.3-Codex
Closed
GPT-5.3 Codex is an AI model from OpenAI.
- Publisher
- OpenAI
- Family
- GPT
- Context
- 400K
- Input
- Output
- License
- proprietary
- Released
- 5 Feb 2026
Cite
Notes
Only stored in your browser.
Context
400K
Input
$1.75
/1M tok
Output
$14
/1M tok
Blended
$4.81
#383/ 414/1M · 3:1
Speed
84
#130/ 414tok/s
Cache read
$0.17
0.10x input
Price & speed via Artificial Analysis · ranked across tracked models · caching via OpenRouter
Reported on 15 evals across 6 domains - best 91.5% on GPQA Diamond · #6 of 449