Claude Opus 5.5 Should Raise Your Ambitions

Claude Opus 5.5 delivers Fable 5.1-level performance at 40% lower cost than Opus 5, with improved agentic coding, communication, and 3D understanding capabilities that should encourage users to be more ambitious with AI applications. The model receives universally positive feedback for being pleasant to work with and reliable for extended independent operation, representing another significant advancement in the AI capabilities landscape.