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GPT-5.4 Thinking System Card
5 March 2026 at 10:00
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Received — 8 March 2026
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ai/automation
GPT-5.3 Instant System Card
3 March 2026 at 10:00
Received — 17 February 2026
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ai/automation
GPT-5.3-Codex System Card
5 February 2026 at 00:00
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.
