Claude Opus 5.5: The Ultimate Guide
The simplest practical guide to Anthropic’s newest model, from everyday Claude work to Claude Code, agents and automations.
TL;DR
- Claude Opus 5.5 is cheaper and faster than its predecessor, Opus 5.
- It boasts a 1 million-token context window and can generate up to 128K tokens in a single response.
- The model is designed for sustained, difficult AI work, making AI agents more viable for complex tasks.
- Early testers have used Opus 5.5 for large-scale code migration and extended operations across multiple software repositories.
- Key features for advanced use include Claude Code, Skills, subagents, memory, loops, automations, and efficient context handling.