GPT-5.2-Codex

Timeline

1. 2025-12-18 · Product update · evidence link
2. 2026-01-14 · API availability · evidence link
3. 2025-12-18 · API availability · evidence link

A connection is possible; a shared identity is not confirmed.

Related signals: GPT-5.2

evidence link

1. 2026-11-14T00:08:04.818Z · Evidence links · OpenAI · official articles
   Excerpt

   While GPT‑5.2‑Codex has not yet reached ‘High’ level of cyber capability, we are preparing for future models that cross that threshold

2. 2026-11-10T18:00:44.369Z · Catalogue listing · GitHub · openai/codex · code
   Excerpt

   input id: plan attributes: label: What subscription do you have? validations: required: true - type: input id: model attributes: label: Which model were you using? description: Like `gpt-5.2`, `gpt-5.2-codex`, etc. - type: input id: platform attributes: label: What platform is your computer? description: | For macOS and Linux: copy the output of `uname -mprs` For Windows: copy the output of `"$([Environment]::OSVersion | ForEach-Object VersionString) $(if ([Environment]::Is64BitOperatingSystem) { "x64" } else { "x86" })"` in the PowerShell console - type: input id: terminal attributes: label: What terminal emulator and version are you using (if applicable)? description: | Also note any multiplexer in use (screen / tmux / zellij). E.g., VS Code, Terminal.app, iT

3. 2026-11-10T17:59:50.472Z · Catalogue listing · GitHub · openai/openai-agents-python · code
   Excerpt

   -pro-2025-10-06", "gpt-5.1", "gpt-5.1-2025-11-13", "gpt-5.1-codex", "gpt-5.1-codex-max", "gpt-5.1-codex-mini", "gpt-5.2", "gpt-5.2-2025-12-11", "gpt-5.2-codex", "gpt-5.2-pro", "gpt-5.2-pro-2025-12-11", "gpt-5.3-codex", "gpt-5.4-mini", "gpt-5.4-mini-2026-03-17", "gpt-5.4-nano", "gpt-5.4-nano-2026-03-17", ), 400_000, ), **_model_context_windows( ( "codex-mini-latest", "o1", "o1-2024-12-17", "o1-pro", "o1-pro-2025-03-19", "o3", "o3-2025-04-16", "o3-deep-research", "o3-deep-research-2025-06-26", "o3-mini", "o3-mini-2025-01-31", "o3-pro"

4. 2026-11-10T17:58:10.980Z · Catalogue listing · GitHub · openai/openai-agents-js · code
   Excerpt

   -nano-2025-04-14', ]); const SANDBOX_CONTEXT_WINDOWS_400K = new Set([ 'gpt-5', 'gpt-5-codex', 'gpt-5-mini', 'gpt-5-nano', 'gpt-5-pro', 'gpt-5.1', 'gpt-5.1-codex', 'gpt-5.1-codex-max', 'gpt-5.1-codex-mini', 'gpt-5.2', 'gpt-5.2-codex', 'gpt-5.2-codex-cyber', 'gpt-5.2-pro', 'gpt-5.3-codex', 'gpt-5.3-codex-spark', 'gpt-5.4-mini', 'gpt-5.4-nano', ]); const SANDBOX_CONTEXT_WINDOWS_200K = new Set([ 'codex-mini-latest', 'o1', 'o1-2024-12-17', 'o1-pro', 'o3', 'o3-2025-04-16', 'o3-mini', 'o3-pro', 'o3-deep-research', 'o4-mini', 'o4-mini-2025-04-16', 'o4-mini-deep-research', ]); const SANDBOX_CONTEXT_WINDOWS_128K = new Set([ 'gpt-4o', 'gpt-4o-2024-08-06', 'gpt-4o-mini', 'gpt-4o-mini-2024-07-18', 'gpt-5-chat-latest', 'gpt-5.1-chat-latest', 'gpt-5.2-chat-latest', 'gpt-5.3-chat-latest', ]);

5. 2026-11-05T00:01:53.188Z · Source entry removed · OpenAI API
6. 2026-10-07T19:17:54.872Z · Evidence links · OpenAI · Codex changelog
7. 2026-10-07T19:17:54.872Z · Evidence links · OpenAI · Codex changelog
   Excerpt

   Starting today, the CLI and IDE Extension will default to gpt-5.2-codex for users who are signed in with ChatGPT

8. 2026-09-17T17:42:08.188Z · Evidence links · OpenAI · API changelog
   Excerpt

   Released gpt-5.2-codex to the Responses API

Evidence links

• 2026-11-05T00:01:53.188Z · Source entry removed · OpenAI API · gpt-5.2-codex

Signals 2

20:1727 Sep

OpenAISighting

New page: GPT-5.2 Codex

Confirmed8 evidence links

22:0911 Sep

OpenAIProduct update

GPT-5.2-Codex: Product update

Confirmed8 evidence links