Mixed
So from this datapoint alone, I do not see an obvious usage-efficiency advantage in switching from Opus 4.7 to Codex/GPT-5.4
bobjordan on Hacker News
consumed 28% of their weekly capacity
In the thread “Opus 4.7 to 4.6 Inflation is ~45%”
… Instead, on these settings and for this workload, both platforms burned the same share of weekly budget. So from this datapoint alone, I do not see an obvious usage-efficiency advantage in switching from Opus 4.7 to Codex/GPT-5.4.