Amazon.com Inc.

09/28/2026 | News release | Distributed by Public on 09/28/2026 14:04

Anthropic's Claude Sonnet 5.5 is now on AWS

Key takeaways

  • Sonnet 5.5 improves on Sonnet 5 with a lower cost per task for most work at faster speed.
  • The new model is built for focused coding work-feature development, bug fixes, and verification tasks.
  • It creates polished knowledge work like one-pagers, diagrams, slides, and spreadsheet edits.
Claude Sonnet 5.5 is now available on Amazon Bedrock and Claude Platform on AWS. Sonnet 5.5 is a smarter, more efficient Sonnet, delivering improved intelligence across coding and knowledge work with a lower cost per task for most work at faster speed.

Sonnet 5.5 is built for well-scoped coding tasks: building and fixing features in the same session, and verifying against requirements. It completes focused development work efficiently, making it a strong fit for teams already building on Sonnet.

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For knowledge work, Sonnet 5.5 helps create polished, ready-to-share office assets-one-pagers, diagrams, summary slides, document edits, and spreadsheets.

Sonnet 5.5 is the second release in the Claude 5.5 model family, following Opus 5.5 (available since September 22). Where Opus 5.5 is the daily driver for production-ready code and complex analyses, Sonnet 5.5 offers a cost-effective alternative for scoped tasks.

Claude Sonnet 5.5 on AWS

Claude Sonnet 5.5 shows improvement in the following areas:
  • More intelligence with fewer tokens-improves on Sonnet 5 capabilities with lower cost per task for most work, making it a natural upgrade for teams already building on Sonnet.
  • Stronger for coding-completes well-scoped tasks as part of a larger coding strategy, from building and fixing features to and verifying against requirements.
  • Ready-to-share knowledge work-helps create polished office assets like one-pagers, diagrams, summary slides, document edits, and spreadsheets..

How to access Claude Sonnet 5.5 on AWS

Get started with Claude Sonnet 5.5 through Amazon Bedrock or Claude Platform on AWS. For a full walkthrough, read more about Claude Opus 5.5 on AWS.

Dive deeper

Visit Anthropic's Claude in Amazon Bedrock product page for more detailed information on Claude Sonnet 5.5, Claude Opus 5.5, Claude Fable 5.1, Claude Opus 5, Claude Sonnet 5, Claude Fable 5, Claude Opus 4.8, Claude Opus 4.7, Claude Sonnet 4.6, Claude Opus 4.6, Claude Haiku 4.5, Claude Sonnet 4.5, Claude Opus 4.5, Claude Opus 4.1, and Claude Sonnet 4.
September 28, 2026: This article has been updated to reflect the availability of Claude Fable 5.1.
September 22, 2026: This article has been updated to reflect the availability of Claude Opus 5.5.
September 1, 2026: This article has been updated to reflect the availability of Claude Fable 5.1.
July 24, 2026: This article has been updated to reflect the availability of Claude Opus 5.
June 30, 2026: This article has been updated to reflect the availability of Claude Sonnet 5.
June 9, 2026: This article has been updated to reflect the availability of Claude Fable 5.
May 28, 2026: This article has been updated to reflect the availability of Claude Opus 4.8.
February 17, 2026: This article has been updated to reflect the availability of Claude Sonnet 4.6.
February 5, 2026: This article has been updated to reflect the availability of Claude Opus 4.6.
November 24, 2025: This article has been updated to reflect the availability of Claude Opus 4.5.
October 15, 2025: This article has been updated to reflect the availability of Claude Haiku 4.5.
September 29, 2025: This article has been updated to reflect the availability of Claude Sonnet 4.5.
August 5, 2025: This article has been updated to reflect the availability of Claude Opus 4.1.
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