I'd be skeptical w.r.t. "by all metrics".

Qwen3.6 is a definitive, significant downgrade from Qwen3.5 for creative writing and prose for example. Yes, it's better at agentic and coding, but it regresses in many non-coding areas compared to Qwen3.5.

Of course, I do expect the 3.8 ones to perform better for agentic coding.