ChatGPT got basic addition wrong and didn’t even realise it
By Holidays in Europe / March 11, 2026 / No Comments / Uncategorized
Title: A Surprising Lesson from ChatGPT: When Even Basic Math Goes Wrong
In the rapidly evolving world of artificial intelligence, ChatGPT has become a valuable tool for generating insights, assisting with complex calculations, and providing explanations across various domains. However, recent experiences remind us that even the most advanced language models are not infallible and can sometimes make fundamental mistakes.
During a recent interaction, I prompted ChatGPT to generate some complex numerical problems related to the confusion matrix—a crucial concept in machine learning and classification tasks. Curious to see the solutions, I attempted to solve the problems provided. However, I quickly noticed inconsistencies that didn’t align with standard calculations.
When I brought this issue to ChatGPT’s attention, it not only failed to recognize the discrepancy but also proceeded to explain the problem in a way that was frankly misleading. To my surprise, the AI had made a basic arithmetic error—specifically, an error in simple addition—that went unnoticed even as it addressed more advanced concepts. This oversight highlights an important aspect of AI interactions: even highly sophisticated models can miscalculate basic operations, leading to explanations or solutions that are fundamentally flawed.
This experience serves as a reminder for users to maintain a critical eye when utilizing AI tools. While ChatGPT and similar models are powerful aids, they are not substitutes for human oversight—particularly when it comes to fundamental concepts like basic arithmetic. Always verify the calculations and understandings provided by these models to ensure accuracy.
In conclusion, as we continue to integrate AI into our workflows, let’s remember the importance of vigilance and cross-checking, especially for seemingly simple tasks that might still trip up even the most advanced algorithms.