Quotes
Claude Sonnet 5 is Anthropic’s daily agent tier
In late June Anthropic put Sonnet 5 out as the scaled coding-and-agents model, before Opus 5. It is the middle tier, not the flagship. The company’s own line is still the shortest description of the job they wanted this row to do.
Sonnet 5 delivers frontier performance across coding, agents, and professional work at scale.