AI chatbots have gone from novelty to essential tool in under two years. Whether you're using them to draft emails, research a topic, write code, or just think through a problem out loud, these tools are genuinely useful in ways that weren't possible before. The key differences between them come down to model quality, context window size, tool integrations, and how they handle nuanced or sensitive topics. We've tested all the major players so you can pick the right one.
OpenAI
ChatGPT by OpenAI is a conversational AI that can help with writing, coding, analysis, math, research, and creative projects. With over 200 million weekly active users, it remains the most widely used AI tool in the world.
Starting at: Free
Anthropic
Claude by Anthropic is a highly capable AI assistant known for its nuanced writing, long context window, and safety-focused design. It excels at analysing lengthy documents and producing thoughtful, well-structured text.
Starting at: Free
Google Gemini is Google's flagship AI assistant. It's multimodal (text, images, code, audio), integrated with Google Workspace, and built on the powerful Gemini 1.5 Pro model.
Starting at: Free
Perplexity AI
Perplexity is an AI answer engine that searches the web in real time and provides accurate, cited answers. Think of it as a smarter Google — every answer comes with links to sources.
Starting at: Free
Both are excellent AI assistants. Here's a detailed head-to-head covering writing quality, reasoning, coding, pricing, and which one to use for different tasks.
ChatGPT and Perplexity both answer questions — but in very different ways. Here's when to use each, with examples of real-world research tasks.
We tested the top AI chatbots for months. Here's an honest comparison of ChatGPT, Claude, Google Gemini, and Perplexity — with clear recommendations for different use cases.
There's a lot of hype about free AI tiers. Here's what the free plans actually give you — and which ones are genuinely useful versus frustratingly limited.