1.Codex 2025-05-19 Codex in the ChatGPT iOS app Start tasks, view diffs,...Unknown|OpenAI/OpenAI APIAPI
2.Codex 2025-08-21 Mid August update Image inputs You can now attach im...Unknown|OpenAI/OpenAI APIAPI
3.Codex 2025-08-27 Late August update IDE extension (Compatible with VS...Unknown|OpenAI/OpenAI APIAPI
4.Codex 2025-09-23 GPT-5-Codex in the API GPT-5-Codex is now available i...Unknown|OpenAI/OpenAI APIAPI
5.Codex 2025-10-06 Codex is now GA Codex is now generally available with...Unknown|OpenAI/OpenAI APIAPI
6.Codex 2025-10-22 Tag @Codex on GitHub Issues and PRs You can now tag @...Unknown|OpenAI/OpenAI APIAPI
7.Codex 2025-10-30 Credits on ChatGPT Pro and Plus Codex users on ChatGP...Unknown|OpenAI/OpenAI APIAPI
11.Codex 2025-11-07 Introducing GPT-5-Codex-Mini Today we are introducing...Unknown|OpenAI/OpenAI APIAPI
12.Codex 2025-11-13 Introducing GPT-5.1-Codex and GPT-5.1-Codex-Mini Alon...Unknown|OpenAI/OpenAI APIAPIv5.1-Codex
13.Codex 2025-11-18 Introducing GPT-5.1-Codex-Max Today we are releasing...Unknown|OpenAI/OpenAI APIAPIv5.1-Codex
14.Codex 2025-12-04 Introducing Codex for Linear Assign or mention @Codex...Unknown|OpenAI/OpenAI APIAPI
15.Codex 2025-12-18 Codex CLI 0.75.0 $ npm install -g @openai/codex@0.75.0...Unknown|OpenAI/OpenAI APIAPIv0.75.0
16.Codex 2025-12-18 Introducing GPT-5.2-Codex Today we are releasing GPT-...Unknown|OpenAI/OpenAI APIAPIv5.2-Codex
18.Codex 2026-01-14 GPT-5.2-Codex API availability GPT-5.2-Codex is now a...Unknown|OpenAI/OpenAI APIAPIv5.2-Codex
19.window.openai.requestModal({ template }) now supports opening a different regist...Unknown|OpenAI/OpenAI APIAPI
20.Tool calls now include _meta["openai/session"], an anonymized conversation id yo...Unknown|OpenAI/OpenAI APIAPI
21.Codex 2026-01-22 Custom prompts deprecated Custom prompts are now depr...Unknown|OpenAI/OpenAI APIAPI
22.Published a new Apps SDK state management guide.Added copy functionality to all...Unknown|OpenAI/OpenAI APIAPI
23.Tool calls now include _meta["openai/session"], an anonymized conversation id yo...Unknown|OpenAI/OpenAI APIAPI
24.Added company knowledge in ChatGPT compatibility guidance for the search/fetch t...Unknown|OpenAI/OpenAI APIAPI
25.Expanded llms.txt coverage to include resources, blog posts, cookbook entries, a...Unknown|OpenAI/OpenAI APIAPI
26.Highlights Introducing gpt-5.2 our latest frontier model with improvements acro...Unknown|OpenAI/OpenAI APIAPIv5.2
27.Highlights Config API cleanup (#7924): new config API and cleaner config loadin...Unknown|OpenAI/OpenAI APIAPIv5.2
29.Highlights Introducing gpt-5.2-codex our latest frontier model with improvement...Unknown|OpenAI/OpenAI APIAPIv5.2-codex
30.PRs Merged #8270 — splash screen #8251 — migrate to new constraint-based loading...Unknown|OpenAI/OpenAI APIAPI