Claude is Anthropic's family of frontier AI models, spanning the Opus (flagship intelligence), Sonnet (general-purpose default), and Haiku (fast, lower-cost) tiers, plus Project Glasswing's Mythos preview class. Models power claude.ai, Claude Code, Claude Cowork, Claude for Chrome, Claude for Slack, Claude for Microsoft 365, and the Claude API.
Update (2026-06-13): On June 12, 2026, Anthropic disabled Claude Fable 5 and Claude Mythos 5 for all customers after the US government…
Claude Opus 4.7 launched on April 16, 2026, and Claude Opus 4.8 launched on May 28, 2026, exactly 41 days later. That…
Update, July 26, 2026: Opus 4.8 is no longer the current Opus model. Anthropic released Claude Opus 5 on July 24, 2026,…