Anthropic's Claude Sonnet 5.5 nearly matches Opus 5.5 on benchmarks while costing up to 30 percent less per task

Anthropic has announced the release of Claude Sonnet 5.5, the second model in the Claude 5.5 family. This model features over 30% faster output generation and up to 30% lower costs per task, making it a strong competitor to Opus 5.5. The new model shows significant performance in knowledge-work benchmarks, nearly matching Opus 5.5. It achieved a jump from 10.3% to 70.6% on the Terminal-Bench coding benchmark, reflecting substantial improvements in its capabilities. With Haiku 5.5 set to be announced in the coming weeks, Anthropic will soon offer a direct counterpart to each of OpenAI's three GPT-6 models, enhancing its competitiveness in the market.