Why Claude and Other LLMs Fail (and What to Actually Do About It) If you’ve spent more than a few hours with Claude, GPT-4o, or any modern LLM, you’ve hit the wall. The model ignores part of your prompt. It confidently states something wrong. It goes off-script mid-task. It refuses something completely reasonable. My thoughts after months of daily use and production deployments: most of these problems are not random, and they are not the model being “dumb.” They follow predictable patterns with identifiable root causes. Once you understand why they happen, fixing them stops feeling like guesswork. ...