Best AI chatbots and assistants
General-purpose AI assistants answer questions, write and edit text, analyze files and help with code. They differ mostly in answer quality on hard tasks, web search, file and image handling, and how generous the free plan is — start with the top three and keep the one that fits your work.
ChatGPT is OpenAI's conversational AI assistant for writing, coding, research and multimodal tasks, available via web, desktop, mobile and API. Its current lineup includes GPT-6 Astra (the flagship), GPT-6 Sol (paid plans) and GPT-6 Luna (Free and Go), with GPT-6.1 Sol and GPT-6.1 Terra available only in ChatGPT Work and Codex.
Gemini
Google's flagship AI assistant with deep Workspace integration, powered by the Gemini 4 Argon model, the most capable Gemini model currently available to the public, alongside the Nano Banana 2.1 image model.
Anthropic's AI assistant, known for careful reasoning, coding, and long documents. Current models include Claude Fable 5.1 (most capable, widely released), Claude Opus 5.5, Claude Sonnet 5.5, and Claude Haiku 5.5, plus the limited-availability Claude Mythos 5.1. Free plan plus Pro ($20/mo billed monthly, or $17/mo billed annually), Max, Team, and Enterprise plans.
DeepSeek is a Chinese AI lab offering a web chat assistant and a paid, metered API, currently running deepseek-flash (served by DeepSeek-V4.1-Flash-1017, released October 17, 2026) and deepseek-v4-pro (DeepSeek-V4-Pro-0813).
Meta AI is Meta's assistant built into WhatsApp, Instagram, Facebook, Messenger, Threads and its AI glasses, offered free within those apps. It runs on Meta's own Muse Spark model family, which replaced the earlier Llama-based engine.
Grok is xAI's conversational AI, integrated with X and available at grok.com. It is now sold as part of The X Subscription, a bundle that also includes X Premium and the Cursor coding tool.
Perplexity is an AI-powered answer engine that returns cited, up-to-date sources instead of a list of links, with an agentic Deep Research mode and multi-model access to systems from OpenAI, Anthropic, Google and other vendors.
Microsoft Copilot (formerly the Microsoft 365 Copilot app) is Microsoft's AI assistant integrated across Windows, Edge, Bing, and the Microsoft 365 apps, with a model selector offering Auto, Quick response, and Think deeper modes.
Character.AI is a conversational platform for chatting with user-created AI characters, but as of October 2026 it is operating under Chapter 11 bankruptcy protection while it seeks a buyer for its assets.
Mistral Vibe (Le Chat)
Mistral's consumer AI assistant, rebranded from Le Chat to Vibe on August 12, 2026, running on Mistral's own Medium 3.5 model (128B parameters, 256k context). It splits into three modes: Vibe Chat for conversation, Vibe Work for agent workflows, and Vibe Code for cloud coding agents.
Comparisons
Your task is different? Describe it in your own words and we'll pick 3 tools for exactly that.