Anthropic·· 2025-05-22
Anthropic introduces Claude Opus 4 and Sonnet 4
Anthropic introduces Claude Opus 4 and Sonnet 4
Brief overview
Historical sample • 22 May 2025. Anthropic announced Claude Opus 4 and Claude Sonnet 4, emphasizing coding, reasoning and agent workflows. Read the original announcement for its evaluations and release context.
Source: Anthropic · anthropic.com