Mixed
Opus 4.5 still worked better for most of my work, which is generally "weird stuff"
nerdsniper on Hacker News
In the thread “GPT-5.3-Codex”, replying to this comment
Helped: Opus 4.5 avoided common LLM assumptions in complex projects.
Got in the way: GPT-5.3-Codex likely falls into standard assumption traps.
Opus 4.5 still worked better for most of my work, which is generally "weird stuff". A lot of my programming involves concepts that are a bit brain-melting for LLMs, because multiple "99% of the time, assumption X is correct" are reversed for my project. …