AI Market: Anthropic launches Claude Opus 5.5 for coding and knowledge work

Anthropic has introduced Claude Opus 5.5, a new flagship model in its Claude family, positioned for complex coding, knowledge work, and longer-running agentic processes. According to the company, Opus 5.5 achieves performance close to the larger Claude Fable 5.1 while requiring less compute and being about 40% cheaper to use than Opus 5. It is also over 30% faster, with token prices reduced to $4 per million input and $20 per million output tokens. The model shows improvements in code migration, audits, and repository-wide work, claiming to analyze a 200,000-line codebase in under three hours. It also performs well on knowledge work benchmarks like GDPval-AA v2.1. Enhanced security features include resistance to prompt injection and an action classifier for safer autonomous operation. Opus 5.5 is available on major cloud platforms, with pricing starting at $4 per million input tokens. Sonnet 5.5 and Haiku 5.5 are expected in the coming weeks.