Gave 6 AI models the same bug. Only 3 got it right.

Tried another little AI test today. I gave ChatGPT, Claude, Gemini, Grok, DeepSeek and Qwen the exact same coding bug and asked them to fix it. I didn't change the prompt. Then I actually tested all six fixes. Only 3 worked properly. Do you guys test AI-generated code before using it, or just trust it if it looks right