Claude

LMArena (formerly Chatbot Arena) is a public, web-based platform that evaluates large language models (LLMs) through anonymous, crowd-sourced pairwise comparisons. Users enter prompts for two anonymous models to respond to and vote on the model that gave the better response, after which the models' identities are revealed. Users can also choose models to test themselves.

Manus is an autonomous artificial intelligence agent developed by the same startup that created Monica, headquartered in Singapore. The agent is designed to independently carry out complex real-world tasks without direct or continuous human guidance.

Claude is a series of large language models developed by Anthropic. The first generation, Claude 1, was released in March 2023, and the latest, Claude Opus 4.5, in November 2025. The data for these models comes from sources such as Internet text, data from paid contractors, and Claude users.

Grok is a generative artificial intelligence chatbot developed by xAI. It was launched in November 2023 by Elon Musk as an initiative based on the large language model of the same name. Grok has apps for iOS and Android and is integrated with Twitter and Tesla's Optimus robot.