Claude and four leading AI assistants compared for 2026. Pricing, flagship models, and fitness for purpose, side by side, so you can choose what fits how you work.
Anthropic's assistant, widely cited for careful reasoning, long-document handling, and software work. Pro at $20 per month includes the flagship model and Claude Code; Max tiers from $100 raise usage limits for heavy users. A free tier has daily caps.
OpenAI's assistant, the most widely used, strong at general tasks, creative writing, and image generation. Plus at $20 per month is the mainstream tier; Pro at $200 unlocks the heaviest reasoning and Sora video. A free, now ad-supported, tier exists.
Google's assistant, strongest if you live in Gmail, Docs, and Drive. Google AI Pro at $19.99 per month bundles Gemini 3 Pro, Deep Research, and several TB of storage; AI Ultra at $249.99 adds top usage limits and frontier video generation.
Microsoft's assistant, woven into Windows, Edge, and the Office apps. The paid individual tier runs $19.99 per month and adds AI inside Word, Excel, PowerPoint, and Outlook, with the deepest value for existing Microsoft 365 subscribers.
A search-first answer engine that cites sources inline and routes between top models. Pro at $20 per month rotates among leading models, adds file analysis and image generation, and includes monthly API credits. A capable free tier covers basic search.
Five files, one cabinet. Pull the one that matches your case.