Anthropic PBC is an American AI safety and research company developing the Claude family of large language models, incorporated as a public benefit corporation and headquartered in San Francisco.
Anthropic PBC is an American artificial intelligence research and commercial company incorporated as a public benefit corporation. It was founded in 2021 by seven former OpenAI employees, including siblings Dario Amodei (CEO) and Daniela Amodei (President). The company is headquartered in San Francisco. Anthropic's primary product is the Claude family of large language models, available through a web and mobile interface (claude.ai), an API, Amazon Bedrock, Google Vertex AI, and desktop applications. The company conducts research into AI safety, model interpretability, and alignment with human values. Its methodology features the Constitutional AI (CAI) technique, in which a model is trained against a defined set of principles. Key products also include Claude Code (an agentic coding tool) and Claude Cowork (a desktop assistant for non-technical users). In February 2026, Anthropic closed a Series G funding round of $30 billion at a valuation of $380 billion. The company serves more than 300,000 business customers and maintains offices in 12 cities worldwide.
Founders
American AI researcher with a Princeton PhD and former VP of Research at OpenAI; co-founded Anthropic in 2021 as CEO.
American executive and former VP of People at OpenAI; co-founder and President of Anthropic.
American ML engineer, lead author of the GPT-3 paper at OpenAI; co-founder of Anthropic.
British technology journalist and former OpenAI policy head; co-founder of Anthropic and author of the Import AI newsletter.
American theoretical physicist, Johns Hopkins professor; co-author of LLM "scaling laws" and co-founder of Anthropic.
American AI researcher who led scaling-laws research at OpenAI; co-founder of Anthropic.
Canadian neural-network interpretability researcher previously at Google Brain and OpenAI; co-founder of Anthropic.
Claude 3.7 Sonnet is Anthropic's hybrid reasoning model released February 24, 2025. Combines standard mode with extended thinking mode and configurable thinking token budget. Retired from Anthropic API on October 28, 2025.
Claude Opus 4.5 is Anthropic's flagship AI model released November 24, 2025. The first model to exceed 80% on SWE-bench Verified (80.9%). Features the effort parameter, extended thinking, computer use, and industry-leading prompt injection resistance.
The most advanced publicly available language model, optimized for agentic coding, long-term autonomous tasks, and image reasoning.
Anthropic's flagship language model from the Claude 4 family, released February 5, 2026, featuring a 1M token context window, adaptive reasoning, and advanced agentic capabilities.
Classification
