ChatGPT (from OpenAI), Claude (from Anthropic) and Gemini (from Google) are the best-known AI assistants. They can all write, summarise, brainstorm, analyse documents, help with code and work with images. The differences are real but change often as each company releases new models, so it's worth understanding how to choose rather than memorising a ranking.
What they have in common
- Strong writing, summarising and reasoning abilities
- Support for uploading documents and images
- Free tiers plus paid plans with more capable models and higher limits
- The same core prompting principles work in all of them
How people often describe them
- ChatGPT is widely used, with a large ecosystem of features such as custom GPTs, image generation and voice conversations.
- Claude is often praised for natural-sounding writing, careful reasoning and working with long documents and code.
- Gemini integrates closely with Google's products, such as Gmail, Docs and Search, which is convenient if you already live in Google Workspace.
These impressions are general and can shift with every update, so test them with your own tasks.
How to choose
- Start with where you work. Integrations with tools you already use can matter more than small quality differences.
- Test your real tasks. Run the same three or four prompts you use most in each assistant and compare.
- Check privacy and business terms if you'll handle work data.
- Consider cost and limits for how often you use it.
Use more than one
Many power users keep two assistants open and compare answers on important tasks. Differences in output often reveal blind spots, and a second opinion costs seconds.
The prompts on this site are labelled with the tool they were written for, but most text prompts work well in all three.