I tested it with my standard test - HTML/JS minesweeper. From the user POV, the result is great and subjectively equivalent to Opus 4.5.

I also asked Claude Code (Opus 4.7) and Codex (GPT-5.4) to review both qwen's output and that of opus 4.5, and both agents concluded qwen's was better.

Minesweeper is simple but nontrivial - 600-800 lines of code that need to be internally consistent. At that complexity level, this model is definitely a viable alternative.

(haven't tested with planning, debugging and more complex problems yet)

I just want sonnet 4.5 but I also want it to be fast which is trickier