Anthropic
The AI safety company behind the Claude model family, Project Glasswing, and the Mythos-class tier. Filed confidentially for an IPO in June 2026.
Anthropic is an AI safety company founded in 2021 by Dario and Daniela Amodei with a group of former OpenAI researchers. It builds the Claude model family and has positioned itself as the lab that treats safety work as a product feature rather than a compliance cost.
The model family
The lineup runs from the fast Haiku tier through Sonnet and Opus up to the new Mythos class, whose first public release is Claude Fable 5. The restricted sibling, Mythos 5, stays inside Project Glasswing, the security program that grew from 11 launch partners and $100 million in credits to roughly 150 organizations across more than 15 countries.
The 2026 inflection
June 2026 compressed the company's trajectory into ten days: a confidential IPO filing on June 1, then the Fable 5 launch on June 9, on the heels of a $65 billion Series H at a valuation near $965 billion. The deeper history, from the leak to the launch, is in our Mythos chronicle.
Primary sources: anthropic.com and the company's Wikipedia entry.