Towards Data Science | Medium Follow One Capital Letter Was Silently Breaking My AI Support Bot, and It Wasn't in the New Model A real Weave project that regression-tests three OpenAI models against the exact reply format your app depends on. https://towardsdatascience.com/one-capital-letter-was-silently-breaking-my-ai-support-bot-and-it-wasnt-in-the-new-model/ towardsdatascience.com