---
format: "aidr-story-markdown/v1"
id: "509f64549de1dc7dde90c19206601213387a0eba6bbec5be7549b705e0e91e07"
canonical_url: "https://aidr.today/509f6454?lang=en"
title: "Introducing Claude Sonnet 5.5 on AWS"
lang: "en"
requested_lang: "en"
available_langs: ["en","vi"]
translation_fallback: null
fallback_fields: []
published_at: "2026-09-28T18:57:13.000Z"
category: "Releases"
topics: ["anthropic","llm"]
source_urls: ["https://aws.amazon.com/blogs/machine-learning/introducing-claude-sonnet-5-5-on-aws/","https://simonwillison.net/2026/Sep/28/claude-sonnet-5-5/"]
summary: "Claude Sonnet 5.5 is now available on Amazon Bedrock and Claude Platform on AWS. It's a smarter, more efficient Sonnet model for focused coding and knowledge work, with a lower cost per task at faster speed. This post covers what's new, when to choose Sonnet, and how to get started."
---

# Introducing Claude Sonnet 5\.5 on AWS

> [Open the canonical story](<https://aidr.today/509f6454?lang=en>)

**Published:** 2026-09-28T18:57:13.000Z
**Category:** Releases
**Topics:** anthropic, llm

## Summary

Claude Sonnet 5\.5 is now available on Amazon Bedrock and Claude Platform on AWS\. It's a smarter, more efficient Sonnet model for focused coding and knowledge work, with a lower cost per task at faster speed\. This post covers what's new, when to choose Sonnet, and how to get started\.

## Sources

- [Story source](<https://aws.amazon.com/blogs/machine-learning/introducing-claude-sonnet-5-5-on-aws/>)
- [Story source](<https://simonwillison.net/2026/Sep/28/claude-sonnet-5-5/>)