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OpenAI

Is GPT-5.4 out? Yes, since March 5, 2026

Yes. GPT-5.4 was released on March 5, 2026.

A browser notification for each confirmed release in this family. No account or email.

Have you used it? GPT-5.4

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Lab
OpenAI
Family
GPT
Release date
Source
OpenAI · GPT-5.4

What changed

  • context +163 % · Context window compared with GPT-5.3-Codex, same tier in this family. Went from 400k tokens to 1.05M tokens.
  • price +43 % · Prompt price compared with GPT-5.3-Codex, same tier in this family. Went from $1.75 / MTok to $2.50 / MTok. Lower is better.

About GPT-5.4

GPT-5.4 is OpenAI’s latest frontier model, unifying the Codex and GPT lines into a single system. It features a 1M+ token context window (922K input, 128K output) with support for...

Next GPT model to watch

Questions

When was GPT-5.4 released?
GPT-5.4 was released on March 5, 2026.
Who makes GPT-5.4?
GPT-5.4 is made by OpenAI.
What comes after GPT-5.4?
GPT-5.4 Mini, released on March 17, 2026.