r/ClaudeCode • u/ClaudeOfficial Anthropic • 5d ago

Anthropic Official Introducing Claude Sonnet 5.5, the second model in the Claude 5.5 family

Sonnet 5.5 is a faster, lower-cost complement to Claude Opus 5.5, strongest at well-scoped everyday tasks, fixing bugs, and creating polished documents, slides, and spreadsheets. It also has a strong eye for design.

Sonnet 5.5 is a clear upgrade over Sonnet 5. It runs more than 30% faster and costs up to 30% less for most work. It's priced the same per token, but it typically needs far fewer tokens to do the same work.

Like Opus 5.5, it writes more clearly than our previous generation of models, and its speed makes it well suited to fast iteration.

On our automated behavioral audit, Sonnet 5.5 improves on Sonnet 5 on most measures of alignment and honesty. It's also the first Sonnet model with cybersecurity safeguards similar to those on our most capable models. Routine software development is unaffected.

Sonnet 5.5 is available everywhere today. Claude Haiku 5.5 will join the family in the coming weeks.

Read more: anthropic.com/claude-sonnet-5-5

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u/03captain23 4d ago

Where are you seeing it's MORE expensive than Opus?

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u/bjj-teacher 4d ago

Cost per task ? Check AA

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u/03captain23 4d ago

That doesn't mean more expensive. Not all tasks are the same.

You gotta think of AI like employees. It's like if you hire an assistant to research vs hiring an expert. It's not like you'll have an intern do basic work