<ul><li>A Reddit post on r/ClaudeAI Subreddit revealed how a seasoned C++ developer was humbled by Claude Opus 4 by fixing a bug that persisted for almost four years.</li><li>The bug stemmed from a large-scale architectural refactor involving around 60,000 lines of code, introducing an elusive edge-case failure related to shader usage.</li><li>Using the Claude Code with the Opus 4 model, the developer resolved the bug in about 30 prompts, uncovering a subtle architectural dependency that had previously gone unnoticed.</li><li>While the developer had tried other models like GPT-4.1 and Gemini 2.5 without success, Claude Opus 4 proved instrumental in diagnosing the underlying issue and providing actionable insights, indicating a milestone in how senior developers may collaborate with AI coding assistants.</li></ul>

Claude Opus 4 Humbles Dev, Fixes 4-Year Bug in 30 Prompts

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