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Source: OpenAI News
📅 13 September 2026 at 04:31 PM UTC
GPT-5.3-Codex System Card
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⚡ Executive Takeaways & Intelligence Summary
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.
Publication Reference: https://openai.com/index/gpt-5-3-codex-system-card
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