Claude Opus 5.5
by AnthropicPerforms at the level of Fable 5.1 on most work, and costs 40% less to run than Opus 5 on typical workloads.
AIMCPCLIAPI
About
Performs at the level of Fable 5.1 on most work, and costs 40% less to run than Opus 5 on typical workloads.
AI & Automation
AIMCPCLIAPI
Claude Opus 5.5 offers agentic coding and knowledge work features. It supports the Model Context Protocol (MCP) and provides a command-line interface (CLI). The product also exposes a public API for programmatic access, including a Message Batches API.