Anthropic Reports 90% of Engineers Now Building Self-Improving AI Systems with Opus 5.5

Anthropic has revealed that roughly 90% of its engineering team is now building with Claude Opus 5.5 and autonomous self-improving loops, with plans to reach 100% adoption within one to two months. The statement underscores a fundamental shift in how the company approaches AI development, moving from traditional prompting to systems that continuously refine and improve themselves.