Smells like hyperbole. A lot of people making such claims don’t seem to have continued real world experience with these models or seem to have very weird standards for what they consider usable. Up until relatively recently, while people had already long been making these claims, it came with the asterisks of „oh, but you can’t practically use more than a few K tokens of context“.
Qwen3-Coder-30B-A3B-Instruct is good I think for in line IDE integration or operating on small functions or library code but I dont think you will get too far with one shot feature implementation that people are currently doing with Claude or whatever.
Presumably not, but the better approach is anyways to first plan using a powerful/expensive model like Opus, then you can use something less capable and cheaper for the coding part. This would be true even if you just want to use Anthropic models, but makes even more sense if you want to use something cheaper like Qwen3.5 or Kimi K2.5 for the coding part.