Claude Sonnet is the mid-tier model in Anthropic's Claude family, positioned between Opus (the flagship) and Haiku (the fastest). Sonnet provides a balance of capability and cost suited for most production workloads. Articles cover Sonnet release coverage, tier-selection guidance, and operational patterns.
Claude Sonnet 5 landed on June 30, 2026, and Anthropic is positioning it as the most agentic Sonnet yet: near-flagship performance on…
Update, July 26, 2026: the current Opus generation is now Claude Opus 5, released July 24, 2026, which replaced Opus 4.8 at…