Claude Sonnet 5.5 vs. Opus 5.5: 42% cheaper and perfect on every run

We’re so glad you’re here. You can expect all the best TNS content to arrive Monday through Friday to keep you on top of the news and at the top of your game. Check your inbox for a confirmation email where you can adjust your preferences and even join additional groups. Anthropic launched Sonnet 5.5 six days after Opus 5.5. The company says it scores 70.6% on Terminal-Bench 4.0, ahead of Opus 5.5’s 66.4% at xhigh effort. It also says Sonnet 5.5 generates output more than 30% faster than Sonnet 5 and uses fewer tokens per task.

First reported by The New Stack. This page is a short excerpt; the full text is theirs.