Model · language model

Claude Sonnet 5.5

Claude Sonnet 5.5 is a model positioned as a smarter, more efficient version of the Sonnet family, aimed at focused coding and knowledge work. Recent news reports that Amazon Bedrock has added the model to its lineup, alongside the Claude Platform on AWS. The release highlights its specific utility for targeted professional tasks.

Claude Sonnet 5.5 is a language model from Anthropic, first covered on 28 September 2026. It is available through an API.

Last updated 28 September 2026, 19:39 UTC

At a glance

Made by: Anthropic
Type: Language model
Availability: API
Licence: Not stated
Context window: Not stated
First seen: 28 September 2026
Launch story: Anthropic to launch Sonnet 5.5 next week, targeting cost savings

Taken from the coverage, not from our own testing; "not stated" means none of the reports we read gave it. All tracked models →

4 stories about Claude Sonnet 5.5

Generative AI & Models 28 Sept new

Claude Sonnet 5.5 available on Amazon Bedrock and Claude Platform on AWS

Amazon Bedrock has added Claude Sonnet 5.5 to its lineup, along with Claude Platform on AWS. The new model is positioned as a smarter, more efficient version of the Sonnet family, aimed at focused coding and knowledge…

1 source primary source

AWS Machine Learning Blog
Generative AI & Models 28 Sept new

Anthropic to launch Sonnet 5.5 next week, targeting cost savings

Anthropic plans to release Sonnet 5.5 next week, positioning it as a more affordable alternative to Opus 5.5. The model has undergone stealth testing and reportedly outperforms existing models like GPT-6 Soul and Luna…

7 sources

The DecoderCNBC TechnologyTechCrunch AIsiliconangle.com +3 more
Generative AI & Models 27 Sept new

Anthropic unveils Claude Opus 5.5 with 40% lower costs and top safety ratings

Anthropic released Claude Opus 5.5, positioning it as a cost-efficient alternative to its top-tier Fable 5.1 model. The new model delivers performance on par with Fable 5.1 while cutting operational costs by 40%…

5 sources

note.com
Generative AI & Models 20 Sept new

Anthropic releases Claude Opus 5.5 with Fable 5.1-level performance and 40% lower cost

Anthropic has released Claude Opus 5.5, the first model in its Claude 5.5 family, available on Amazon Bedrock and Claude Platform on AWS. The model delivers performance comparable to Claude Fable 5.1 on most workloads…

16 sources primary source

note.comAWS Machine Learning Blogdigit.intheverge.com +8 more