ChatGPT vs Claude for Coding: The One I Actually Open

	ChatGPT	Claude
What it costs me	Nothing, free plan	$20 a month, Pro
Code I gave it	Pages and tests on this site	Pages and tests on this site
Other job	Reading errors and fixing them	Reading errors and fixing them
How it fails	Writes functions the library does not have	Stops me at the cap, mid-job
How often that bites	Every few sessions, on unfamiliar packages	2 or 3 days in a working week
I open first	Yes	No

Claude's listed price is from Anthropic's pricing page, read on 29 September 2026. Everything about ChatGPT below is my own use on the free account; OpenAI's pricing page would not load for me on 1 October 2026, so I am not quoting its plan limits.

Both got the same files

I built this site's pages and tests with both of them, and I debug with both. The one I open for code now is ChatGPT on its free plan, which costs me nothing. I also keep Claude Pro at $20 a month, and its cap stops me 2 or 3 days in a working week, so I wait for the window instead of finishing elsewhere. ChatGPT's problem is different: it hands me functions that do not exist in the library I am using, and the file will not compile until I go and check the docs myself.

Which failure costs me more time

Both failures waste my time, in different ways. A made-up function name shows up the moment I save the file, because the build or the test says so. Ten minutes in the library's own docs and it is over. A cap is not like that. It arrives when the job is half done, and nothing I do makes the window come back sooner.

So I have learned to read any code I did not write twice, especially an import or a method on a package I rarely touch. If the name looks convenient, I check that it is real before I run anything.

Why I still pay for the plan I open less

That sounds like I should cancel the paid one. I have not, because the $20 covers more than code for me. I wrote about how that plan holds up against the other one I have in my Claude Pro and Google AI Pro comparison, and I set up the Gmail and Calendar side of it in the connector walkthrough. For writing code, I reach for the free account, because it is there on the days the paid one has shut.

What this does not tell you

I am one developer on one small Next.js site, and I never ran the two side by side on the same task with a stopwatch. I have no count of right answers for either. If you work in a big repository, or in a language I do not use, my answer will not transfer. The question that does transfer: which of the two failures hurts your day more, a wrong line you catch in seconds, or a tool that shuts while you are in the middle of something.