Anthropic drops Claude Sonnet 5.5 with 30% speed boost and massive coding leap
Anthropic just released Claude Sonnet 5.5, running over 30% faster and cutting per-task costs by up to 30% compared to Sonnet 5. It marks a huge jump in agentic coding, scoring 70.6% on Terminal-Bench 4.0 up from 10.3%, while nearly matching the flagship Opus 5.5 across routine enterprise and knowledge tasks.