Grok

OpenAI's flagship assistant, powered by GPT-5.5 — voice, vision, and a sprawling ecosystem of custom GPTs.

Anthropic's frontier AI assistant, powered by Claude Opus 4.8 — best-in-class for long context, writing, and complex reasoning.

AI answer engine with live citations — the reasoning assistant for research and curious minds.

Microsoft's consumer AI assistant for chat, search, and image generation, integrated across Windows, Edge, and Bing.