Claude Sonnet 5 brings agentic coding near Opus 4.8 at lower Sonnet pricing, with benchmarks and API details.

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.