Anthropic's Claude Sonnet 5.5 Is Out, Beats Opus 5.5 at Coding for Half the Price

Anthropic's mid-tier model tops its own flagship on Terminal-Bench 4.

Anthropic's mid-tier model tops its own flagship on Terminal-Bench 4.0 and costs half as much per token, but an independent tester found it burns more tokens than any model it has measured.