← ChatGPT & Codex changelog

ChatGPT — March 16, 2026

v2026-03-16-9680579f includes 2 changes. GPT-5.3 Instant update

Source: official ChatGPT & Codex release notes. Summaries are written from the official notes; see how we work.

Changed

  • GPT-5.3 Instant update
  • We’re rolling out an update to GPT-5.3 Instant that improves follow-up tone and reduces teaser-style phrasing in responses (e.g., “If you want…”, “You’ll never believe…”, “I can tell you these three things that…”).

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