The real annoying thing about Opus 4.5 is that it's impossible to publicly say "Opus 4.5 is an order of magnitude better than coding LLMs released just months before it" without sounding like a AI hype booster clickbaiting, but it's the counterintuitive truth, to my personal frustration.
I have been trying to break this damn model since its November release by giving it complex and seemingly impossible coding tasks but this asshole keeps doing them correctly. GPT-5.3-Codex has been the same relative to GPT-5.2-Codex, which just makes me even more frustrated.
It strains belief that anyone working on a moderate to large project would not have hit the edge cases and issues. Every other day I discover and have to fix a bug that was introduced by Claude/Codex previously (something implement just slightly incorrect or with just a slightly wrong expectation).
Every engineer I know working "mid-to-hard" problems (FANG and FANG adjacent) has broken every LLM including Opus 4.6, Gemini 3 Pro, and GPT-5.2-Codex on routine tasks. Granted the models have a very high success rate nowadays but they fail in strange ways and if you're well versed in your domain, these are easy to spot.
Granted I guess if you're just saying "build this" and using "it runs and looks fine" as the benchmark then OK.
All this is not to say Opus 4.5/6 are bad, not by a long shot, but your statement is difficult to parse as someone who's been coding a very long time and uses these agents daily. They're awesome but myopic.
CC confidently iterated until it discovered the issue. CC confidently communicated exactly what the bug was, a detailed step-by-step deep dive into all the sections of the code that contributed to it. CC confidently suggested a fix that it then implemented. CC declared victory after 10 minutes!
The bug was still there.
I’m willing to admit I might be “holding it wrong”. I’ve had some successes and failures.
It’s all very impressive, but I still have yet to see how people are consistently getting CC to work for hours on end to produce good work. That still feels far fetched to me.
Also, "order of magnitude better" is such plainly obvious exaggeration it does call your objectivity into question about Opus 4.5 vs. previous models and/or the competition.
But I have to give it to Amodei and his goons in the media, their marketing is top notch. Fear-mongering targeted to normies about the model knowing it is being evaluated and other sort of preaching to the developers.