Anthropic

Anthropic PBC is an American artificial intelligence company founded in January 2021 by siblings Dario Amodei (CEO) and Daniela Amodei (President), along with several other former OpenAI researchers. Headquartered in San Francisco, Anthropic operates as a public benefit corporation focused on AI safety research and developing reliable, interpretable, and steerable AI systems.

The Amodei siblings left OpenAI due to directional differences - Dario was VP of Research and Daniela was VP of Safety & Policy. They founded Anthropic with the conviction that AI safety should be at the center of AI development, not an afterthought.

Key Milestones:

• 2021: Founded by Dario and Daniela Amodei with a team of former OpenAI researchers
• 2022: Received $580 million in funding (including $500M from FTX); developed Constitutional AI (CAI), a novel alignment technique where the model is trained to follow ethical principles via self-critique; trained the first Claude model internally but withheld public release for safety testing
• 2023: Launched Claude publicly; released Claude 2; Google invested $500M (committed $1.5B more over time); Amazon invested $4 billion
• 2024: Released Claude 3 family (Haiku, Sonnet, Opus); launched Claude 3.5 Sonnet; introduced Artifacts and Computer Use capabilities
• 2025: Released Claude 3.5 Haiku, Claude 4.5 (Sonnet, Opus, Haiku); launched Claude Code (AI coding agent); raised $3.5B Series E at $61.5B valuation, then $13B Series F at $183B valuation
• 2026: Released Claude Opus 4.6 and Claude Sonnet 4.6 (flagship models); closed $30B Series G at $380B valuation - the second-largest venture deal of all time

Products & Services:

• Claude: Family of LLMs available via web interface, API, Amazon Bedrock, iOS app, and Mac/Windows desktop apps
• Claude Code: AI coding agent generating over $2.5 billion in annual revenue, accounting for more than half of all enterprise spending on Anthropic products
• API: Developer platform with Messages API, tool use, vision, and extended context windows
• Constitutional AI: Pioneering alignment research approach where models are trained using a set of principles rather than human feedback alone

Financials (2025–2026):

• Run-rate revenue of $14 billion (growing over 10x annually for three consecutive years)
• Customers spending over $100K annually grew 7x in the past year
• Total funding raised: over $50 billion across all rounds
• $380 billion valuation as of February 2026

Safety Research: Anthropic is known for its focus on mechanistic interpretability (understanding how neural networks work internally), Constitutional AI, and responsible scaling policies. The company publishes extensive safety research and maintains a Responsible Scaling Policy that ties model capability levels to specific safety commitments.

Leadership: Dario Amodei (CEO), Daniela Amodei (President), Tom Brown (co-founder), Chris Olah (co-founder, interpretability research lead), Jack Clark (co-founder, Head of Policy).