Both are good, and the brand matters less than the shape of the tool. The real split is chat versus agent: pasting code into a chat window is a different activity from letting something read your repo, edit files and run your tests.
1. Reach for Claude when
- You’re editing across many files or a whole repo.
- You want it to plan first and make reviewable changes — see plan mode.
- You’re pasting big files or specs and want them held in one long context.
- You want the agent in your terminal or editor rather than in a browser tab.
2. Reach for ChatGPT when
- It’s a quick one-off snippet or a “how do I do X” question.
- You want images, data analysis or voice in the same place — see clean spreadsheet data with ChatGPT.
- You’re exploring an unfamiliar API conversationally, before any code exists.
3. Check what your plan includes
This decides it for a lot of people, and most comparisons skip it:
Claude Code requires Pro, Max, Team, Enterprise, or a Claude Console account.
The free Claude.ai plan does not include Claude Code access.
What it does: rules out the terminal agent on a free account. ChatGPT will still answer coding questions on its free tier, and Claude’s own chat interface works free too — it’s the agent that’s paid.
4. Honestly: the agent matters more than the brand
A tool that shows diffs and asks before editing beats copy-pasting code back and forth, whichever model is behind it. That is true of Claude Code and equally true of Cursor — see Claude Code vs Cursor.
Verify it worked
Take a real task you’ve been putting off — a small refactor with tests. Do it once by pasting into a chat, once with an agent in the repo. The difference shows up in how much retyping you did, not in any single answer.
Then pick one and learn its shortcuts. New to the agent workflow? Start with your first Claude Code session. Choosing between models rather than tools? See pick an AI model.
Source: Claude Code quickstart.