Anthropic Introduces Claude Opus 5.5, Now Available On All Platforms, Including AWS, Google Cloud & Microsoft Azure; Claude Opus 5.5 Performs At Level Of Claude Fable 5.1 On Most Work, Costs Around 40% Less To Run Than Opus 5; Says Over Coming Weeks, We'll Also Be Launching Claude Sonnet 5.5 & Haiku 5.5