Much better value by using K2.7 Code with GitHub cli via opencode subscription - at $10/month gives you $60 worth of usage (for now) - you get $5 usage credits per day (with some weekly / monthly limits)
gpt-5.5xhigh leading benchmark, coincides with my recent experience. I've been opus 4.7 user but it burns tokens so quickly, so gave gpt-5.5xhigh (via codex) a try, quality was similar (if not better), and tokens lasted a lot longer.
As a side project am writing Android app for forward collision warning (FCW), lane departure alert (LDA) along with some ADAS functions. In the mid term an planning to connect it to the cruise control.
p.s. for an old Mitsubishi Delica D5 that I bought for car camping.