---
title: "gpt-5.3-codex xhigh first impressions"
date: 2026-02-06
canonical: https://solmaz.io/x/2019747343881421082/
x_url: https://x.com/onusoz/status/2019747343881421082
license: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)
---

gpt-5.3-codex xhigh first impressions

does not seem as big of a jump as from 5.1 -> 5.2. but model somehow feels more diligent and oneshotty. maybe takes longer time to get all the info into context. also feels better at debugging and fixing issues from backend logs