Anthropic

Anthropic, PBC is an American artificial intelligence public benefit corporation headquartered in San Francisco, California. Its flagship product is Claude, a series of proprietary large language models. In January 2021, with the goal of promoting AI safety, Anthropic was founded by former members of OpenAI, including siblings Daniela Amodei and Dario Amodei, who are president and CEO, respectively. The company is privately held but plans an initial public offering in November 2026. Valued at $965 billion in a May 2026 Series H capital raise, Anthropic is the world's most valuable AI pure play, rivaled by OpenAI. Anthropic develops the LLM Claude in four tiers: Fable, Opus, Sonnet, and Haiku. Claude is accessible via an online chatbot, an API, and Anthropic's agent harnesses: Claude Code, Cowork, Design, and Science. Its model class Claude Mythos, a less restricted version of Fable, is available only to approved US organizations with a cybersecurity and life sciences focus. Anthropic's Project Panama, internally described as an "effort to destructively scan all the books in the world", provides training data for Claude.