Insane cost difference between Claude Opus 5.5 and Codex Sol 6.1

A user developing a SaaS application for architecture and interior design noted a significant cost difference between Claude Opus 5.5 and Codex Sol 6.1. The user had been scraping over 80 brands and 60,000 products using Opus 5.5, which consumed about 40% of their weekly limit. Upon switching to Sol 6.1 for the same task, following identical rules and markdown files, the user expressed surprise at the cost implications.