Am i missing something? Because your making my point. Its only worth it compared to Opus 4.8, if the tasks your running requires Opus 4.8 low (or non-existing lower).

For the rest the gap in pricing vs efficiency is so small, that there is no point in using Sonnet. I am looking at their own cost comparisons vs efficiency...

The point is that Sonnet at medium or even low will be smart enough for most daily tasks. You’re defining “worth using” as if you always need the highest performance possible, which is what these benchmarks measure, but most work doesn’t need it. You’ll pay more to get the same result. Sonnet 4.5 is very popular as a main model currently, this is a free upgrade.

I use Haiku a lot for agent workflows, if I can get better output at similar prices, Sonnet 5 will replace it completely.