Short answer
ChatGPT, Claude, Gemini and Perplexity all offer a free plan, but “free” always has limits. None is free and unlimited for everything, and the limits change, so check the vendor’s page.
What the official pages say (11 Nov 2026)
- Claude Free: limited usage every 5 hours and every week; includes chat, web search, file creation and Artifacts.
- ChatGPT Free: text chats described as unlimited within abuse guardrails, with limited file uploads, images and voice. The cheaper Go plan may show ads.
What to check before relying on one
- Message or usage limits and how often they reset.
- File upload and image limits.
- Whether free output may be used commercially. Read the terms first.
- Whether your chats are used to improve the model, and how to opt out.
Tools mentioned
Question source: Google “People also ask” for “Which AI chat is totally free?”, checked 11 Nov 2026.
We have not hands-on tested every tool. Read more: Best Free AI Chatbots in 2026 · Best Free AI Tools in 2026
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