I'd argue that Qwen3.8-Flash-Next is basically at Opus 4.6/4.8 level from about 6 months ago.

Maybe at Opus 4.6 level for the "easier" tasks. But honestly if you were given a choice between a computer with Qwen 3.8 or one with even older Sonnet 5, both local, same tok/s, window size, etc... what are you picking?