> ## Documentation Index
> Fetch the complete documentation index at: https://www.vibecodeapp.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Claude Sonnet 5.5

> Fast everyday Claude model for coding, agents, and knowledge work

Claude Sonnet 5.5 is Anthropic's fast everyday model for coding, agents, and knowledge work.

It has a 1M-token context and adaptive thinking at half the price of Opus 5.5.

## Best For

* AI chat features
* Coding help
* Agent workflows
* Knowledge and writing tasks

## Features

* Fast responses
* Adaptive thinking
* 1M-token context
* Half the price of Opus 5.5

## Ask Vibecode

Tell the AI:

> "Add Claude Sonnet 5.5 to my app for fast, capable AI chat."

The AI will set up the integration automatically.

## Choose This If

Choose Claude Sonnet 5.5 for most Claude-powered features. For tougher tasks, use [Claude Opus 5.5](/docs/integrations/claude-opus-5-5).

<CardGroup cols={2}>
  <Card title="Browse All Integrations" icon="grid-2" href="/docs/integrations/index">
    See the full integrations catalog
  </Card>

  <Card title="Claude Opus 5.5" icon="message-bot" href="/docs/integrations/claude-opus-5-5">
    Stronger Claude for hard tasks
  </Card>
</CardGroup>


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.