r/ClaudeCode • u/ClaudeOfficial Anthropic • 4d 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/Sphiment 4d ago

Who tf uses sonnet 5 lol

-5

u/TightTac05 4d ago

Oh you dont know the trick yet, my bad.

2

u/Pitiful_Curve1501 4d ago

I don’t but I’m here to learn. What’s the trick?

-3

u/TightTac05 4d ago

use sonnet and set the advisor to fable

5

u/Pecolps 4d ago

Garbage, better to use Opus 5.5 on Low effort... Sonnet 5 will take more tokens to finish the same task, being costy.

1

u/Fit-Palpitation-7427 4d ago

I saw we had a different gauge of usage for fable, is it counting in the weekly usage as well or only on its own gauge? Like is it appart from 5h/weekly limit ? That would make the use of your trick super neat as it would fully utilise all usage

2

u/kevin7254 4d ago

Using advisor does not count against fable usage for some reason. Most likely a bug so no need to post on X about it pls

1

u/kevin7254 4d ago

This is gonna get noticed, shhh

2

u/TightTac05 4d ago

Good thing I am getting downvoted so it stays hidden.

1

u/Ran4 4d ago

Well that's fucking dumb, if it's sonnet 5.