"Create a single page web app scientific RPN calculator"

Qwen 3.5 122b/a10b (at q3 using unsloth's dynamic quant) is so far the first model I've tried locally that gets a really usable RPN calculator app. Other models (even larger ones that I can run on my Strix Halo box) tend to either not implement the stack right, have non-functional operation buttons, or most commonly the keypad looks like a Picasso painting (i.e., the 10-key pad portion has buttons missing or mapped all over the keypad area).

This seems like such as simple test, but I even just tried it in chatgpt (whatever model they serve up when you don't log in), and it didn't even have any numerical input buttons. Claude Sonet 4.6 did get it correct too, but that is the only other model I've used that gets this question right.

is your prompt literally 1-sentence?

if so, a better approach would be to ask it to first plan that entire task and give it some specific guidance

then once it has the plan, ask it to execute it, preferably by letting it call other subagents that take care of different phases of the implementation while the main loop just merges those worktrees back

it's how you should be using claude code too, btw

We tend to find Qwen3-Coder-Next better at coding at least on our anecdotal examples from our codebases. It's somewhat better at tool calling, maybe the current templates for Qwen3.5 are still not enjoying as "mature" support as Qwen3 on vllm. I can say in my team MiniMax2.5 is the currently favorite.