GPT-5.3-Codex System Card
OpenAI
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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OpenAI
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.
View offerOpenAI
ChatGPT Ads reaches $1 billion in annualized revenue run rate and expands globally, supporting broader access to AI through free and affordable options.
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Cloudflare OAuth now supports optional scopes, giving users more control over what an app can access and helping developers build secure consent flows around the task at hand.
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OpenAI banned accounts linked to the Rybar network, some of which likely originated in Russia, that used AI to support multilingual influence activity across websites and social platforms.
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A deep dive into why Codex Security doesn’t rely on traditional SAST, instead using AI-driven constraint reasoning and validation to find real vulnerabilities with fewer false positives.
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Learn how to use ChatGPT, start your first conversation, and discover simple ways to write, brainstorm, and solve problems with AI.
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A new preprint shows GPT-5.2 proposing a new formula for a gluon amplitude, later formally proved and verified by OpenAI and academic collaborators.
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Cooley built GO Public with ChatGPT Work to bring intelligence to the IPO process, helping lawyers surface issues earlier and focus judgment where it matters most.
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Learn how to use ChatGPT for writing to draft, revise, and refine content with clear structure, tone, and intent.
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Explore OpenAI’s European Youth Safety Blueprint and EMEA Youth & Wellbeing Grants, advancing safe, responsible AI for teens, families, and educators.
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