Claude Opus 5.5: The Ultimate Guide

Anthropic’s Claude Opus 5.5 offers significant improvements in cost, speed, and the ability to handle prolonged complex tasks. This makes previously unfeasible AI agent applications now practical. The model’s advancements are centered around its capacity for extended and complex operations, demonstrated by early tester results.

• 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.
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