ChatGPT, Google Gemini, Claude and Perplexity compared — everyday questions, coding, long documents and sourced answers, plus which free plan is actually enough.
You need to draft a tricky email, summarise a 40-page PDF, debug a function or settle a factual argument before a meeting, all from your phone. Every assistant in this category can do something, yet none wins at everything: one searches live and shows its sources, another lives inside the Google apps you already use, a third is the default for writing and coding, and the careful one is favoured by developers for precision. The differences that matter are how current its information is, where it plugs into your workflow, how it handles long files and how quickly the free plan starts limiting you. The 4 apps in this guide were chosen because each occupies a distinct, defensible position rather than because there are dozens of near-identical chatbots.
ChatGPT is the all-round default: the most capable free plan of the big assistants, useful for writing, coding, documents, images and voice.
ChatGPT is the most widely used AI chatbot in the world, with hundreds of millions of users, and that scale is reflected in a polished app that answers questions, drafts text, summarises documents, writes code and analyses images or voice. Its free plan is unusually generous for a market leader, which is why it has become the safe first install for everyday AI. The trade-offs are the usual ones: answers can still be wrong and need checking, the free tier enforces usage limits, and genuinely heavy use means moving up to Plus.
Google Gemini is the natural choice inside Gmail, Docs and Google Workspace, with room for very long files and multimodal input.
Gemini slots directly into Gmail, Google Docs, Maps and the wider Workspace ecosystem, so the AI works where your documents and email already live instead of behind a separate chat window. Its large context window takes in long documents, images, video and audio together, which suits analysing whole recordings or lengthy files in one pass. The catch is that its most advanced features require a Gemini Advanced subscription, it is less customisable than ChatGPT in some respects, and you need a Google account to use it at all.
Claude, from Anthropic, is the careful professional's pick, especially for code and long documents where accuracy beats speed.
Claude has built its reputation on coding, long-document analysis and reasoning through complex questions in careful, precise language, which is why many developers and professionals treat it as their default. It offers a free plan alongside paid plans with more capacity, so you can test its style before committing. Compared with the other three, it has fewer native integrations than Gemini or Copilot, a smaller plugin community than ChatGPT and the same kind of usage caps on its free tier, so its appeal is specifically the quality of the work rather than an ecosystem.
Pros
Strong, precise help with coding and code analysis
Perplexity is the assistant to open when every claim needs a link: it searches the web live and attaches numbered sources to each answer.
What separates Perplexity from a standard chatbot is accountability: every response arrives with numbered, clickable sources, so a claim can be traced back to where it came from instead of being taken on trust. Because it queries the web in real time, it sidesteps the stale knowledge cutoff that limits other models, which makes it genuinely useful for research and quick fact-checking. Its weaknesses are clear too. It is less convincing than ChatGPT on open-ended creative writing, the pages it cites are not always reliable or relevant, and its more advanced model sits behind a subscription.
Pros
Every answer links numbered, checkable sources
Live web search, so information is not stuck at a cutoff
Genuinely strong for research and fact-checking
Cons
Weaker than ChatGPT on creative, open-ended writing
Download price only. In-app purchases and subscriptions may cost extra.
Questions & answers
What is the best free AI app in 2026?
For general use, ChatGPT still offers the most capable no-cost plan: it writes, codes and analyses images without a subscription. Google Gemini also has a generous free tier and is the obvious pick if you already live in Gmail or Google Docs. Claude and Copilot provide free versions as well, but their usage limits are tighter, so you hit the paywall sooner. The practical approach is to keep two installed: the free one for routine questions and whichever assistant best matches where you work.
Which AI assistant is best for coding?
Claude is the favourite among many developers for the quality and precision of its code, particularly on complex projects and long codebases. ChatGPT is also very strong and has the advantage of a huge community, so examples, integrations and troubleshooting answers are easy to find. If your day runs inside the Microsoft ecosystem, Copilot plugs straight into your editor and the rest of that stack.
ChatGPT, Gemini, Claude or Perplexity: which one should I pick?
Follow your main use. ChatGPT is the versatile default for everyday writing, questions and coding. Gemini makes sense when Gmail, Docs and the rest of Google Workspace are where your work happens. Claude is the reference for code and long-document analysis where you value precision over speed. Perplexity is the one to open when you need current information with sources you can verify. Many people end up using two: a general assistant and a search-first one.
More related apps
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