Yes, GPT 5.4 is better at finding bugs in traditional code. This has been easy to verify since its release. Its also worse at everything else, in particular using anything recent, or not overengineering. Opus is much better at picking the right tool for the job in any non-debugging situation, which is what matters most as it has long-term consequences. It also isn't stuck in early 2024. "Docs MCPs" don't make up for knowledge in weights.
I agree. You're preaching to the choir. But I can also appreciate that there's plenty of tasks and use cases where being stuck in 2024 is still incredibly modern, and debugging is a much more valuable skill than picking the right tool for the job.
