Opus 5.5 fixes in 20 minutes a bug GPT 6 Astra couldn't find in 2 weeks
3rdhope · reddit · 2026-10-15
A developer says Opus 5.5 vastly outperforms GPT 6 Astra (ULTRA) for coding: he spent 2 weeks trying to get Astra to locate an intermittent one-frame hesitation bug in procedural animation, with Astra repeatedly insisting nothing was wrong.
Given the codebase with a brief explanation, Opus found the bug in 20 minutes — plus 5 more bugs during review — and suggested smoother finger animation. He's switched coding entirely to Opus but still uses ChatGPT for image generation.
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