large language model

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.

Beijing Zhipu Huazhang Technology Co., Ltd.,a branded internationally as Z.ai, is a Chinese technology company specializing in artificial intelligence (AI). The company was formerly known as Zhipu AI outside China until its rebranding in 2025. As of 2024, it is one of China's "AI Tiger" companies by investors and considered to be the third largest LLM market player in China's AI industry according to the International Data Corporation.In January 2025, the United States Commerce Department blacklisted the company in its Entity List due to national security concerns.

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.