I created an HMTL file with a minor one-line bug (a divide that would result in a non-integer) and the bug would prevent it from loading and just display a black page instead, the prompt was to find the bug.

The model I used was Qwen-3.6-27B on an RTX-5090.

Claude Code churned for over 8 minutes and couldn’t figure it out.

I installed Open Code and gave it the same prompt and the same model, and it figured out the issue in a minute.

Btw, Qwen-3.6-35B MoE model couldn’t figure it out in both Claude Code and Open Code, so the 27B model clearly won in this test. What was surprising was Open Code solving it while Claude Code struggling

Has anyone else noticed/measured a difference or was this just a glitch in the matrix?