Release
Anthropic releases Claude Sonnet 5.5
Anthropic announced Claude Sonnet 5.5 on September 28, 2026, describing it as a faster, lower-cost complement to Claude Opus 5.5. Anthropic says it is available in the Claude apps and on its platforms, including Amazon Web Services, Google Cloud, and Microsoft Azure. Anthropic's model documentation lists the API identifier claude-sonnet-5-5 with a 1M-token context window. It is a hosted model; Anthropic has not published its weights.12
Related catalog entries
Sources
Share or cite this page
- X (opens X)
- Bluesky (opens Bluesky)
- LinkedIn (opens LinkedIn)
- Reddit (opens Reddit)
- Hacker News (opens Hacker News)
- Email (opens your email app)
- RSS updates
Cite this page
APA style
USASI. (2026, October 1). Anthropic releases Claude Sonnet 5.5. United States of America Superintelligence. https://unitedstatesofamericasuperintelligence.com/news/anthropic-releases-claude-sonnet-5-5/
BibTeX
@misc{usasi_news_anthropic_releases_claude_sonnet_5_5,
author = {{USASI}},
title = {Anthropic releases Claude Sonnet 5.5},
year = {2026},
month = oct,
howpublished = {\url{https://unitedstatesofamericasuperintelligence.com/news/anthropic-releases-claude-sonnet-5-5/}},
note = {United States of America Superintelligence. Last updated 2026-10-01}
}The date is when this page was last updated. Add the date you read it if your style needs one.