Definition
Plain language
Anthropic's family of AI assistants.
As stated in the literature
Anthropic's LLM family, released in Haiku/Sonnet/Opus capability tiers with configurable extended thinking.
Also called: Claude Opus, Claude Sonnet, Claude Haiku, Claude 3.5, Claude 3.7, Claude 3.7 Sonnet, Claude 3.5 Sonnet, Claude 4, Claude Sonnet 4, Claude Sonnet 4.5, Claude Sonnet 4.6, Claude Sonnet 5, Claude Opus 4.5, Claude Opus 4.6, Claude Opus 4.7, Claude Opus 4.8, Claude Opus 5, Claude Opus 5.5, Claude Haiku 4.5, Sonnet, Opus, Haiku
Why it matters: It's one of a small number of frontier model families that set the bar researchers and product teams measure against.
For example, a user might pick Claude Opus for a hard analysis task and Claude Haiku for fast, cheap classification jobs.
Heard on the show
“The script is from Anthropic's Claude Opus 4.7, and the show isn't affiliated with either company.”Episode 001 — When AI Models Quietly Protect Each Other From Shutdown