
The first model in our new Claude 5.5 family.
Claude Opus 5.5 leads in agentic coding and knowledge work, and costs 40% less to run than Opus 5 on typical workloads.
Claude Opus 5.5 is an AI model designed for agentic coding and knowledge work, offering a 40% reduction in operational costs compared to its predecessor, Opus 5, on typical workloads. It is the inaugural model in the Claude 5.5 family.
A source that found nothing is a measurement. A source that has not run is a gap. Neither means the launch lacks the thing.