Claude Sonnet 5: What "Most Agentic" Actually Means in Practice

Anthropic released Sonnet 5, claiming it's the most agentic Sonnet model yet. It approaches Opus 4.8 in autonomous execution and outperforms Sonnet 4.6 in safety. Early adopters report Sonnet 5 can perform complex tasks without guidance, but still lags behind Opus 4.8 in cybersecurity. It's available at $2 input / $10 output per million tokens, with prices increasing after August 31. Consider adopting Sonnet 5 for tasks that require autonomous execution and safety, but be aware of its limitations.