Claude AI tool excels in code debugging over Gemini and ChatGPT

AI code generation tools follow a multi‑step process: they interpret prompts, retrieve relevant knowledge, generate hypotheses, produce code, and evaluate the output. Leading tools are categorized as chat assistants (ChatGPT, Gemini, Claude), code‑completion plugins (GitHub Copilot, Gemini Code Assist), AI‑integrated IDEs (Cursor, IBM Bob) and CLI‑based utilities (Claude Code, Codex AI).

A practical test compared Claude, Gemini, and ChatGPT on fixing a Python bug caused by mutable default arguments. Claude not only corrected the code but also explained why the default argument is evaluated only once at function definition, recommending the use of ``None`` or new object creation inside the function. Gemini offered a good reasoning process, while ChatGPT simply supplied a corrected snippet without explanation. The analysis highlights that AI tools that teach the underlying cause support developer growth, whereas those that only rewrite code can foster dependency and hinder learning.