tech
March 6, 2026
Vibe Check: GPT-5.4—OpenAI Is Back
GPT-5.4 is fast, opinionated, and good enough to tempt our Opus loyalist
TL;DR
- OpenAI's GPT-5.4, GPT-5.3 Codex, and Codex desktop app are shifting the AI coding race back towards OpenAI.
- GPT-5.4 offers improved code reviews, a more conversational voice, and is half the price of Opus 4.6.
- New features include a 1 million token context window and support for OpenAI's computer use agent (CUA).
- Potential drawbacks of GPT-5.4 include expanding tasks beyond scope and prematurely declaring tasks complete.
- OpenAI is iterating rapidly, with many team members now using its coding tools daily.
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