1. Start from your main use cases
Instead of asking “which model is the most powerful?”, start with a simpler question: “what do I do most often?” Your typical tasks will naturally point you to one model or a small combination.
- Writing and everyday questions → general assistant
- Reading and analysing long PDFs → long-context model
- Fast, web-connected answers → search-centric model
2. Quick strengths of each model
ChatGPT: balanced general assistant
Great default choice for most people. It is strong at reasoning, explaining concepts, writing and re-writing text, and works well as a daily “thinking partner”.
Claude: long documents and careful reading
If you often work with long PDFs, research papers or big reports, Claude is designed to handle long context more comfortably and give structured summaries.
Gemini: fast answers and Google integration
Gemini is useful when you want quick answers connected to Google services and search. It shines in “find this quickly and explain it” type of tasks.
3. Simple decision rules
If you want a quick rule of thumb:
- Just starting with AI? Use ChatGPT as your main assistant.
- Mostly long, complex documents? Add Claude for reading and analysis.
- Need tight integration with Google tools? Use Gemini alongside your main model.
4. You do not have to pick only one
Many people combine tools instead of choosing a single one. For example:
- Draft an email or article with ChatGPT,
- Check a long PDF with Claude,
- Ask Gemini for quick, web-connected facts.