# AWS adds Claude Opus 5.5 and Sonnet 5.5 to Kiro in GovCloud

_Published Friday, October 9, 2026 at 2:09 PM EDT · AI · Latest · Tier 2 — Notable_

AWS says Claude Opus 5.5 and Claude Sonnet 5.5 are now available in Kiro's coding interface and command-line tool in AWS GovCloud (US). Both models have a 1M context window, allowing them to process large amounts of information in one request.

In Kiro's internal benchmarks, Opus 5.5 used roughly 40% fewer tool calls and about half the tokens of Opus 5. Its credit multiplier falls from 2.2x to 2.0x. AWS says Sonnet 5.5 produces output more than 30% faster than Sonnet 5 and has a 1.3x credit multiplier. Developers must update and restart their Kiro software to access the models.

## Sources

- [Recent Announcements](https://aws.amazon.com/about-aws/whats-new/2026/06/kiro-claude-5-5-aws-govcloud-us/)

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Canonical: https://techandbusiness.org/newswire/D0ZRsWnLHLF6AK71b1Hb4j
Published: 2026-10-09T18:09:49.845Z
Story chronology: 2026-10-09T17:13:00.000Z
Retrieved: 2026-10-09T19:55:04.741Z
Publisher: Tech & Business (techandbusiness.org)