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Anthropic is an American AI safety company founded in January by Dario Amodei (CEO) and Daniela Amodei (President), along with five other former OpenAI researchers including Jared Kaplan (Chief Science Officer), Jack Clark, Sam McCandlish, Tom Brown, and Chris Olah. The company is headquartered at 500 Howard Street, San Francisco, California. Anthropic develops Claude, a family of large language models, and products including Claude Code, Claude Cowork, and Claude Design. The company filed a confidential S-1 with the SEC in June at a valuation of approximately $965 billion, making it the fastest climb to near-trillion status in startup history. Anthropic employs approximately 2,500 people and reported $47 billion in annualised revenue by May. Major investors include Amazon, Google, Lightspeed Venture Partners, and Fidelity.
OpenAI is one of the worlds leading artificial intelligence research and deployment companies, founded and headquartered in San Francisco, California. The company develops the GPT family of large language models including GPT-4 and GPT-5, the ChatGPT consumer product with over 800 million weekly active users, the Sora video generation model, the DALL-E image generation model, and the Whisper speech recognition system. OpenAI provides API access for developers, ChatGPT subscriptions for consumers and enterprises, and is preparing for a US public listing reportedly valuing the company at up to one trillion dollars.
Mistral AI is a French artificial intelligence company founded in April by Arthur Mensch (CEO, former Google DeepMind researcher), Guillaume Lample (Chief Scientist, former Meta AI), and Timothée Lacroix (CTO, former Meta AI). The company is headquartered in Paris, France with offices in London and Palo Alto. Mistral develops open-weight large language models including Mistral Large, Codestral, and Magistral, and provides enterprise AI deployment through its platform Le Chat. The company has raised over $3 billion in total funding, with a September Series C valuing it at $13.8 billion led by ASML. By June, Mistral was in talks to raise approximately €3 billion at a ~€20 billion valuation. Revenue reached approximately $400 million ARR by January. Mistral was named to TIME's 100 Most Influential Companies.
Google DeepMind is the unified AI research division of Alphabet, formed in April by merging Google Brain and DeepMind Technologies. Headquartered in London, United Kingdom with major research operations in Mountain View, California, the company is led by Sir Demis Hassabis (Nobel Prize in Chemistry) and develops the Gemini family of multimodal foundation models including Gemini Ultra, Pro, and Flash. DeepMind also created AlphaFold for protein structure prediction (winning the Nobel Prize), AlphaGo, AlphaZero, and continues research on artificial general intelligence, reinforcement learning, and scientific applications of AI through Google Cloud, Google Workspace, and Bard now Gemini.
xAI is an artificial intelligence company founded by Elon Musk and headquartered in Palo Alto, California with major data center operations in Memphis, Tennessee. The company develops the Grok family of large language models including Grok 4 with real-time access to X (formerly Twitter) data and built-in web search. xAI operates the Colossus supercomputer in Memphis featuring over 200,000 Nvidia H100 GPUs making it one of the largest AI training clusters in the world. Products include Grok consumer chat through X Premium, the xAI API for developers, and integration into Tesla and SpaceX product ecosystems.
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