Claude Sonnet 5.5

Claude Opus 5.5 and Claude Sonnet 5.5 are available on Amazon Bedrock in AWS GovCloud (US) Regions. AWS published a setup guide for running Anthropic's Claude Code against them for regulated workloads, including ITAR. Pricing, context window and benchmark figures were not disclosed.

Google unveiled Gemini 4 Argon, its new flagship model, which sits behind only Claude Opus 5.5 and Claude Sonnet 5.5 on the Artificial Analysis Intelligence Index. Access begins with trusted cybersecurity partners, with no date given for wider availability.

Anthropic released Claude Sonnet 5.5, claiming it runs 30%+ faster and costs up to 30% less than Sonnet 5 while beating it on benchmarks, at the same price. The model now powers the free tier on claude.ai, giving Anthropic a notably stronger free offering than OpenAI's ChatGPT.

Anthropic's Claude Sonnet 5.5 is now available on Amazon Bedrock and Claude Platform on AWS, positioned as a faster, lower-cost model for well-scoped coding and document tasks. It pairs with the recently released Claude Opus 5.5, which handles higher-judgment work.

Anthropic has released Claude Sonnet 5.5, the second model in its Claude 5.5 family, delivering major coding and knowledge-work gains that approach flagship Opus 5.5 performance while using up to 30% fewer tokens per task. Per-token pricing stays unchanged at $2/$10 per million input/output tokens.