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Claude — permanent Free plan, no card needed claude.ai
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Grok — free tier available on grok.com and X grok.com
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Heads up — there is no standing “ChatGPT Plus free trial”. Be wary of sites claiming one
New here? — start with What Is AI?

Verified 30 Sep 2026

What is Chatbot?

In one line

A program you talk to in everyday language, such as ChatGPT, Claude or Grok.

Modern chatbots are built on large language models and can write, explain, plan and code.