AI Chat Assistant

character.AI c.ai

Character.AI is the world's largest role-playing chat platform, allowing users to freely talk to "characters" created by AI, generate stories and interact with voice.

Grok Grok

Grok is a multi-modal AI chat assistant launched by xAI, with built-in real-time X data access, Imagine image/video generation and Grok 4 inference capabilities.

Chegg Chegg

A long-established online learning platform that integrates AI Q&A and expert coaching services

Claude Opus 4.1 Anthropic

A high-intensity inference model for real coding and Agent tasks, more suitable for multi-step project execution and detail tracking than Opus 4

GPT-4.5 OpenAI

OpenAI research preview version of large-scale chat model, better understanding of human speech