DeepSeek is a Chinese AI company funded by the hedge fund High-Flyer. It is known for its focus on fundamental research and the pursuit of Artificial General Intelligence (AGI), rather than immediate commercial applications. DeepSeek prioritizes making its training results and models publicly available at low cost, and has an open, independent approach. It is also known for efficient resource use in model training, unconventional hiring practices, and a unique organizational culture without KPIs. DeepSeek aims to democratize AI access and compete with major tech companies.

Mistral AI is a French artificial intelligence company specializing in open-weight large language models (LLMs). Founded in April 2023 by former Google DeepMind and Meta AI engineers, it aims to provide an alternative to proprietary AI systems. Mistral AI has released several models, including Mistral 7B, Mixtral 8x7B, Mixtral 8x22B, and Codestral 22B with open weights. Other models, such as Mistral Large and Mistral Medium, are available via API. The company is known for its focus on open-source innovation. It has also developed a chatbot service, Le Chat, and a development platform, La Plateforme.

Perplexity AI is a conversational search engine that uses large language models to provide direct answers to queries by pulling information from the web in real-time and citing sources. It is designed as an alternative to traditional search engines, summarizing information from multiple sources into a concise response. Unlike ChatGPT, which is a general-purpose conversational AI, Perplexity AI focuses on factual queries and research. Perplexity AI is known for its accuracy and reliability, due to its access to real-time data. It also offers features such as an internal knowledge search and the ability to create customized knowledge spaces.

Microsoft Copilot is a generative AI chatbot developed by Microsoft, based on the GPT-4 series of large language models. It was initially released as Bing Chat in February 2023, then rebranded as Microsoft Copilot. Copilot is integrated into various platforms including Microsoft 365 applications, Windows 11, and mobile apps. Copilot assists users with tasks such as content creation, data analysis, and task automation. It can summarize documents, draft emails, generate presentations, and provide insights in Excel. Microsoft Copilot is designed for business and productivity.

Google Gemini is a family of multimodal AI models developed by Google, designed to understand and generate text, images, audio, video, and code. Gemini is also a chatbot and a planned replacement for Google Assistant. It is designed to be flexible and scalable, running efficiently from data centers to mobile devices. The models come in different sizes, including Ultra, Pro, Flash, and Nano, each optimized for different tasks and devices. Gemini is integrated into Google products like Search, Gmail, and Workspace, with developers able to access it via the Gemini API. Google has also incorporated Gemini into its Pixel phones.

ChatGPT is an AI chatbot developed by OpenAI. It is designed to generate human-like text and can be guided by users to customize the response's length, tone, style, detail, and language. ChatGPT is versatile, used for tasks such as writing code, composing music, answering queries, and translating or summarizing text. It has been trained through a mix of supervised and reinforcement learning, and can retain a limited context of prior exchanges in a conversation. It also has the capability to access real-time information from the internet.