Anthropic shipped Claude Sonnet 5 on June 30, 2026, and the framing in the announcement is unusually...

Claude Sonnet 5 is the most agentic Sonnet model yet, rivaling Opus 4.8 in performance at lower prices, Anthropic said.

Anthropic's Claude Sonnet 5 is available on GitLab Duo Agent Platform. It's the first model to complete every task in our evaluation suite, delivering higher quality.

Our most agentic Sonnet yet, with top-tier intelligence for coding and everyday professional work.

Safer, cheaper, and nothing to do with cybersecurity