Anthropic's Claude Sonnet 5.5 Is Out, Beats Opus 5.5 at Coding for Half the Price
60-second summary
Anthropic releases Claude Sonnet 5.5, a mid‑tier model that outperforms its flagship on the Terminal‑Bench 4.0 coding suite while charging roughly 50 % of the per‑token cost of Opus 5.5; however, an independent tester notes it consumes more tokens than any measured model, suggesting higher usage could offset lower pricing and influence developers’ cost‑benefit calculations.
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.