Model release · curated entry
OpenAI releases GPT-5.3-Codex
Introducing GPT-5.3-Codex
- Date
- February 5, 2026
- Category
- Model release
- Organization / Model
- OpenAI
- Evidence
- 2 sources · 2 evidence families
The release combines Codex's coding strength with the newer reasoning models and targets software engineering tasks that run for a long time.
Curator's note: Cross-checked against the OpenAI announcement and the OpenRouter catalog.
Curated sources · 2
Cite this page
This page is a curated static snapshot and can be cited directly. Preferred format GB/T 7714—2025 (electronic resource [EB/OL]); the other 5 styles open below, together with the machine-readable files.
GB/T 7714—2025 (electronic resource [EB/OL])
AI 纪年. OpenAI 发布 GPT-5.3-Codex[EB/OL]. (2026-02-05)[2026-11-03]. https://aihist.net/e/gpt-5-3-codex-2026.html.
APA 7 · American Psychological Association
AI 纪年. (2026, February 5). OpenAI 发布 GPT-5.3-Codex [Web page]. https://aihist.net/e/gpt-5-3-codex-2026.html
MLA 9 · Modern Language Association
"OpenAI 发布 GPT-5.3-Codex." AI 纪年, 5 Feb. 2026, aihist.net/e/gpt-5-3-codex-2026.html. Accessed 3 Nov. 2026.
Chicago 17 · notes-bibliography
AI 纪年. "OpenAI 发布 GPT-5.3-Codex." Published Feb. 5, 2026. Accessed Nov. 3, 2026. https://aihist.net/e/gpt-5-3-codex-2026.html.
IEEE · citation-reference list
"OpenAI 发布 GPT-5.3-Codex," AI 纪年, 5 Feb. 2026. [Online]. Available: https://aihist.net/e/gpt-5-3-codex-2026.html. [Accessed: 3 Nov. 2026].
ACM · author-date variant
AI 纪年. February 5, 2026. OpenAI 发布 GPT-5.3-Codex. Retrieved November 3, 2026 from https://aihist.net/e/gpt-5-3-codex-2026.html.
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