What to test for free
Run five real tasks: one email, one document summary, one coding question, one research question and one planning task. Compare which answer needs less editing and fewer fact checks.
When ChatGPT free is enough
ChatGPT can be enough when you need occasional drafting, explanations, brainstorming and general help. Upgrade when limits, model access, files, voice, search or coding workflows start blocking real work.
When Claude free is enough
Claude can be enough when you need occasional careful writing, summarizing and document-style reasoning. Upgrade when long work, projects, usage limits or Claude Code/Cowork access becomes important.
Practical recommendation
Use the same prompt in both tools. Judge the result by factual stability, tone, source discipline, structure, actionability, privacy fit and how much human editing remains. A model that wins one task can lose the next.