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Which AI chatbot is best?

Last checked: 17 October 2026 · The AI Till, UK

Short answer

No single AI chatbot is best at everything. ChatGPT is the strongest all-rounder, Gemini fits best if you use Google, Copilot if you use Microsoft 365, Claude for long writing and documents, and Perplexity for research with sources. All have free plans, so test your own tasks on two before paying.

The top five, side by side

Chatbot	Best for	UK App Store price (17 October 2026)
ChatGPT	All-round writing, images, spreadsheets, agents	Free; Go £6.99, Plus £19.99 a month
Gemini	Gmail, Drive, Google Docs users; video	Free; AI Plus £4.49, AI Pro £18.99 a month
Claude	Long documents, careful writing, coding	Free; Pro £20 a month
Microsoft Copilot	Outlook, Word and Excel users	Free; included in some Microsoft 365 plans
Perplexity	Research with linked sources	Free; Pro £20 a month

How to know which AI to use

List the three jobs you do most (quotes, emails, research, social posts).
Give two chatbots the same prompt and real material.
Pick the one whose answers need the least fixing.
Use a business plan for customer data.

Comparisons

ChatGPT vs Claude, ChatGPT vs Gemini, ChatGPT vs Copilot, ChatGPT vs Perplexity, and the full guide.

Sources

Checked 17 October 2026. Rules and prices change, so check the source before you rely on it. This is general information, not legal, tax or financial advice.

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