Claude is a family of state-of-the-art large language models developed by Anthropic. This guide introduces the available models and compares their performance.
How Large Language Models Actually Work
Mapping the Mind of a Large Language Model
We have identified how millions of concepts are represented inside Claude Sonnet, one of our deployed large language models. This is the first ever detailed look inside a modern, production-grade large language model.
Tracing the thoughts of a large language model
Anthropic's latest interpretability research: a new microscope to understand Claude's internal mechanisms
Anthropic on Twitter / X
In previous research, we found that Claude expresses over 3,000 values, like honesty and warmth. In new work, we asked how the values Claude expresses vary between Claude models and across languages.We analyzed 300K+ anonymized conversations to find out.https://t.co/PgxsMXipt5— Anthropic (@AnthropicAI) July 13, 2026