Ask HN: Claude Opus 4.5 vs. GPT 5.1 Codex Max for coding. Worth the upgrade?

I’m using gpt-5.1-codex-max comfortably for coding and hitting the weekly limit sometimes (but a few extra credits usually cover it).

I’ve heard Opus 4.5 might be better for coding. SWE-bench shows an 8% improvement but I'm having a hard time guessing what kind of effect that maps to in reality. For those who’ve switched, what changes have you seen, and how has it affected your work? Is the $100/month upgrade worth it?

2 points | by terabytest 1 day ago

1 comments

  • chaidhat 23 hours ago
    You must have immense patience to daily drive codex. To be honest, I’ve observed better code quality from codex (in terms of separation of concerns, high cohesion loose coupling, etc.) but Opus has great quality at roughly 1/3rd of the speed. Try it on Cursor maybe then decide if you want to switch. I’m curious — have you tried gemini pro 3 and do you thibk deserve the hype?