Today, we’re excited to announce the availability of Claude Opus 5.5 on Amazon Bedrock and Claude Platform on AWS , the first of the Claude 5.5 model family.

Claude Opus 5.5 is Anthropic’s most capable Opus model suitable for agentic coding, knowledge work, and long-running tasks.

This post covers Claude Opus 5.5’s improvements, practical guidance, and how to start building with the model on Amazon Bedrock.

What makes Claude Opus 5.5 different According to Anthropic, Claude Opus 5.5 does more with fewer tokens than Claude Opus 5, and new pricing passes those gains straight to customers.

Lower per-token prices and much cheaper cache reads stack on top of the efficiency gains.

The result is an average lower cost per task than Claude Opus 5, so teams can run more ambitious agentic work at scale.

Claude Opus 5.5 is trained to communicate more clearly.

As it works, it surfaces what it did, what it found, and what it needs, making long-running tasks easier to follow.

Adaptive thinking is always on, and Opus 5.5 decides how much reasoning each task needs.

You can use effort as your control instead of manual thinking budgets.

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