GPT-5.3 Codex

Cronología

1. 2026-02-05 · Actualización de producto · enlace de referencia
2. 2026-02-24 · Disponibilidad en API · enlace de referencia
3. 2026-02-09 · Actualización de producto · enlace de referencia

1. 2026-11-13T23:47:52.113Z · Uso confirmado · OpenAI · official articles · Introducing GPT-5.3-Codex
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   How we used Codex to train and deploy GPT‑5.3‑Codex

2. 2026-11-13T23:47:52.113Z · Enlaces de referencia · OpenAI · official articles
3. 2026-11-13T22:47:01.410Z · Enlaces de referencia · OpenAI · official articles
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   Over recent months, we’ve continued improving the safeguards we introduced with GPT‑5.3‑Codex while preparing GPT‑5.4 for deployment

4. 2026-11-12T18:45:20.401Z · Entrada de catálogo · GitHub · openai/openai-node · code
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   "incomplete_details": null } MessagePhase: type: string description: | Labels an `assistant` message as intermediate commentary (`commentary`) or the final answer (`final_answer`). For models like `gpt-5.3-codex` and beyond, when sending follow-up requests, preserve and resend phase on all assistant messages — dropping it can degrade performance. Not used for user messages. enum: - commentary - final_answer MessageRequestContentTextObject: title: Text type: object description: The text content that is part of a message. properties: type: description: Always `text`. type: string enum: - text x-stainless-const: true text: type: string description: Text content to be sent to the model required:

   Esta referencia en el código no confirma un identificador de modelo en uso.

5. 2026-11-10T18:00:44.369Z · Entrada de catálogo · GitHub · openai/codex · code
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   ty::List, /*priority*/ 1_000, TruncationPolicyConfig::bytes(/*limit*/ 10_000), ); let specific = test_remote_model_with_policy( "gpt-5.3-codex", ModelVisibility::List, /*priority*/ 1_000, TruncationPolicyConfig::bytes(/*limit*/ 10_000), ); let specific = ModelInfo { display_name: "GPT 5.3 Codex".to_string(), model_messages: Some(ModelMessages { instructions_template: Some("use specific prefix".to_st

   Esta referencia en el código no confirma un identificador de modelo en uso.

6. 2026-11-10T18:00:44.369Z · Entrada de catálogo · GitHub · openai/codex · code
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   while requested model was {requested_model}"); let warning_message = format!( "Your account was flagged for potentially high-risk cyber activity and this request was routed to gpt-5.2 as a fallback. To regain access to gpt-5.3-codex, apply for trusted access: {CYBER_VERIFY_URL} or learn more: {CYBER_SAFETY_URL}" ); self.send_event( turn_context, EventMsg::ModelReroute(ModelRerouteEvent { from_model: requested_model.clone(), to_model: server_model.clone(), reason: ModelRerouteReason::HighRiskCyberActivity, }), ) .await; self.send_event( turn_context, EventMsg::Warning(WarningEvent { message: warning_message.clone(), }), ) .await; true } pub(crate) async

   Esta referencia en el código no confirma un identificador de modelo en uso.

7. 2026-11-10T17:59:50.472Z · Entrada de catálogo · GitHub · openai/openai-agents-python · code
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   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", "o3-pro-2025-06-10", "o4-mini", "o4-mini-2025-04-16",

8. 2026-11-10T17:58:16.002Z · Entrada de catálogo · GitHub · openai/openai-python · code
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   phase: anyOf: - $ref: '#/components/schemas/MessagePhase-2' description: Labels an `assistant` message as intermediate commentary (`commentary`) or the final answer (`final_answer`). For models like `gpt-5.3-codex` and beyond, when sending follow-up requests, preserve and resend phase on all assistant messages — dropping it can degrade performance. Not used for user messages. - type: 'null' type: object required: - type - id - status - role - content title: Message description: A message to or from the model. DirectToolCallCaller: properties: type: type: string enum: - direct default: direct x-stainless-const: true type: object required: - type ProgramToolCallCaller: properties:

   Esta referencia en el código no confirma un identificador de modelo en uso.

9. 2026-11-10T17:58:16.002Z · Entrada de catálogo · GitHub · openai/openai-python · code
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   "incomplete_details": null } MessagePhase: type: string description: | Labels an `assistant` message as intermediate commentary (`commentary`) or the final answer (`final_answer`). For models like `gpt-5.3-codex` and beyond, when sending follow-up requests, preserve and resend phase on all assistant messages — dropping it can degrade performance. Not used for user messages. enum: - commentary - final_answer MessageRequestContentTextObject: title: Text type: object description: The text content that is part of a message. properties: type: description: Always `text`. type: string enum: - text x-stainless-const: true text: type: string description: Text content to be sent to the model required:

   Esta referencia en el código no confirma un identificador de modelo en uso.

10. 2026-11-10T17:58:10.980Z · Entrada de catálogo · GitHub · openai/openai-agents-js · code
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    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', ]);

11. 2026-10-07T19:17:54.872Z · Enlaces de referencia · OpenAI · Codex changelog
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    GPT-5.3-Codex in Cursor and VS Code Starting today, GPT-5.3-Codex is available natively in Cursor and VS Code

12. 2026-09-17T17:42:08.188Z · Enlaces de referencia · OpenAI · API changelog
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    Released gpt-5.3-codex to the Responses API

Señales 2

16:2710-21

OpenAIDetección

GPT-5.3 Codex: Actualización de producto

Confirmado6 enlaces de referencia

22:0909-11

OpenAIDetección

GPT-5.3 Codex: Actualización de producto

Con respaldo6 enlaces de referencia