Anthropic launched Claude Opus 5.5, outperforming rivals in seven of nine benchmarks with top coding scores. It offers 40% lower costs and 30% faster speeds than Opus 5, excelling in long-context tasks like code migration. Priced at $4 per million input tokens, it features enhanced security with fewer isolation bypasses. Released on AWS, GCP, and Azure, the update highlights industry trends toward agent efficiency and cost reduction, prompting immediate competitive responses from OpenAI.