Anthropic released Claude Sonnet 5.5 on September 28, positioning it for everyday coding and document work. The company says output generation is more than 30% faster than Sonnet 5 and that many tasks cost up to 30% less in its testing.
Lower task costs, not lower token rates
Published prices remain $2 per million input tokens and $10 per million output tokens, with cache reads at $0.20 per million tokens. Anthropic attributes the savings to using fewer tokens to complete work. These are vendor-reported results, rather than a guarantee for every application.
Anthropic also reports a 70.6% score on Terminal-Bench 4.0, compared with 10.3% for Sonnet 5. Haiku 5.5 is planned for the coming weeks.
Two AWS routes
AWS confirmed availability through Amazon Bedrock and Claude Platform on AWS. Bedrock offers AWS-managed features such as Guardrails and Knowledge Bases. Claude Platform on AWS provides Anthropic’s native platform experience with AWS billing and authentication.
Sources: Anthropic launch announcement; AWS availability announcement.
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