GPT-5-Codex

Timeline

1. 2025-09-15 · Product update · evidence link · evidence link
2. 2025-09-23 · API availability · evidence link

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

Related signals: GPT-5

evidence link

1. 2026-11-14T01:20:31.106Z · Confirmed use · OpenAI · official articles · Introducing upgrades to Codex
2. 2026-11-14T01:20:31.106Z · Evidence links · OpenAI · official articles
   Excerpt

   For developers using Codex CLI via API key, we plan to make GPT‑5‑Codex available in the API soon

3. 2026-11-12T18:45:20.401Z · Catalogue listing · GitHub · openai/openai-node · code
   Excerpt

   earch' | 'o3-deep-research-2025-06-26' | 'o4-mini-deep-research' | 'o4-mini-deep-research-2025-06-26' | 'computer-use-preview' | 'computer-use-preview-2025-03-11' | 'gpt-5.5-pro' | 'gpt-5.5-pro-2026-04-23' | 'gpt-5-codex' | 'gpt-5-pro' | 'gpt-5-pro-2025-10-06' | 'gpt-5.1-codex-max' | 'gpt-daybreak-blue-latest' | 'gpt-daybreak-red-latest' | 'gpt-5.6-cyber' | 'gpt-6-cyber' | 'gpt-rosalind-research' | 'gpt-6-rosalind' | (string & {}); /** * The object type of this resource - always set to `response`. */ object: 'response'; /** * An array of content items generated by the model. * * - The length and order of items in the `output` array is dependent on the * model's response. * - Rather than accessing the first item in the `output` array and assuming it's * an `assistant` messag

4. 2026-11-10T18:00:44.369Z · Catalogue listing · GitHub · openai/codex · code
   Excerpt

   use pretty_assertions::assert_eq; use toml::Value as TomlValue; use url::Url; #[test] fn app_server_accepts_cli_config_overrides() { let args = AppServerArgs::try_parse_from([ "codex-app-server", "-c", "model=\"gpt-5-codex\"", "--config", "sandbox_mode=\"read-only\"", "--listen", "off", ]) .expect("parse app-server args"); let parsed_overrides = args .config_overrides .parse_overrides() .expect("parse config overrides"); assert_eq!( parsed_overrides, vec![ ( "model".to_string(), TomlValue::String("gpt-5-codex".to_string()), ), ( "sandbox_mode".to_string(), TomlValue::String("read-only".to_string()), ), ] ); } #[test] fn app_server_accepts_

   This code reference does not establish a working model identifier.

5. 2026-11-10T17:59:50.472Z · Catalogue listing · GitHub · openai/openai-agents-python · code
   Excerpt

   "gpt-4.1-mini-2025-04-14", "gpt-4.1-nano", "gpt-4.1-nano-2025-04-14", ), 1_047_576, ), **_model_context_windows( ( "gpt-5", "gpt-5-2025-08-07", "gpt-5-codex", "gpt-5-mini", "gpt-5-mini-2025-08-07", "gpt-5-nano", "gpt-5-nano-2025-08-07", "gpt-5-pro", "gpt-5-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-n

6. 2026-11-10T17:58:16.002Z · Catalogue listing · GitHub · openai/openai-python · code
   Excerpt

   "o4-mini-deep-research", "o4-mini-deep-research-2025-06-26", "computer-use-preview", "computer-use-preview-2025-03-11", "gpt-5.5-pro", "gpt-5.5-pro-2026-04-23", "gpt-5-codex", "gpt-5-pro", "gpt-5-pro-2025-10-06", "gpt-5.1-codex-max", "gpt-daybreak-blue-latest", "gpt-daybreak-red-latest", "gpt-5.6-cyber", "gpt-6-cyber", "gpt-rosalind-research", "gpt-6-rosalind", ], str, None, ] = None """Model ID used to generate the response, like `gpt-6-astra`. OpenAI offers a wide range of models with different capabilities, performance characteristics, and price points. Refer to the [model guide](https://developers.openai.com/api/docs/models) to browse and compa

7. 2026-11-10T17:58:10.980Z · Catalogue listing · GitHub · openai/openai-agents-js · code
   Excerpt

   'gpt-5.4-pro', 'gpt-5.4-pro-2026-03-05', 'gpt-4.1', 'gpt-4.1-2025-04-14', 'gpt-4.1-mini', 'gpt-4.1-mini-2025-04-14', 'gpt-4.1-nano', 'gpt-4.1-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',

8. 2026-11-05T14:39:16.565Z · Evidence links · OpenAI · Model release notes
   Excerpt

   We're excited to announce that GPT-5-codex is now available in the Responses API , in addition to codex surfaces

9. 2026-11-05T14:39:16.565Z · Evidence links · OpenAI · Model release notes
   Excerpt

   In day-to-day use, GPT-5-codex supports fast interactive edits and can run independently on longer tasks when needed

10. 2026-11-05T00:01:53.188Z · Source entry removed · OpenAI API
11. 2026-10-07T19:40:56.675Z · Evidence links · OpenAI · news

Evidence links

• 2026-11-05T00:01:53.188Z · Source entry removed · OpenAI API · gpt-5-codex

Signals 1

20:4215 Sep

OpenAISighting

GPT-5-Codex: Product update

Confirmed6 evidence links