# OpenAI — GPT-5.3-Codex System Card

- Company: OpenAI (openai.com)
- Announced: 2026-02-05T00:00:00+00:00
- Category: new-model
- Subject: GPT / ChatGPT / API
- Models affected: GPT-5.3-Codex, GPT-5.2-Codex, GPT-5.2
- Source: https://openai.com/index/gpt-5-3-codex-system-card
- Record: https://forck.live/items/282-gpt-5-3-codex-system-card

OpenAI announces GPT-5.3-Codex, described as the most capable agentic coding model to date, combining the coding performance of GPT-5.2-Codex with the reasoning and knowledge capabilities of GPT-5.2.

## Evidence

Verbatim from https://openai.com/index/gpt-5-3-codex-system-card:

> GPT‑5.3-Codex is the most capable agentic coding model to date, combining the frontier coding performance of GPT‑5.2-Codex with the reasoning and professional knowledge capabilities of GPT‑5.2.

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Record: https://forck.live/items/282-gpt-5-3-codex-system-card
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