What Is Claude AI?
Summary
Overview of Claude AI, a family of LLMs by Anthropic, detailing its Constitutional AI approach, model tiers (Haiku, Sonnet, Opus), version history, and coding tool Claude Code.
Key quotes
Claude’s development is guided by Claude’s Constitution, a “foundational document that both expresses and shapes who Claude is.”
Anthropic refers to its overall approach as Constitutional AI.
The article provides a technical and commercial overview of Anthropic’s Claude models, including their naming conventions and pricing tiers. It specifically highlights the evolution of the model series up to Claude 4.6 and the introduction of Claude Code.