PANews reported on May 23 that Anthropic officially released two new models, Claude Opus 4 and Claude Sonnet 4, at the developer conference. Opus 4 performed best on the SWE-bench validation set (72.5%, 79.4% in high computing mode), becoming the world's leading automatic programming model. Sonnet 4 also reached 72.7%, surpassing OpenAI o3 and Codex-1. Rakuten's test showed that Opus 4 can program continuously for 7 hours, stably handling complex tasks, breaking industry records. The new model supports the use of parallel tools and improved memory mechanisms. Claude Code is now fully open.