# Claude Haiku 5.5

Claude Haiku 5.5 brings adaptive reasoning to Anthropic’s low-cost Haiku family for everyday tasks, tool use, and scaled sub-agent deployments. It is the first Haiku with adjustable effort levels, letting developers balance reasoning depth and token usage for each task, with the option to turn thinking off for simpler requests.

- **Model ID:** `anthropic/claude-haiku-5.5`
- **Type:** chat
- **Providers:** anthropic, vertexAnthropic, bedrock, claudeaws
- **Context window:** 1,000,000
- **Maximum output tokens:** 128,000
- **Pricing:** $0.10/1M input tokens, $0.50/1M output tokens
- **Canonical page:** https://vercel.com/ai-gateway/models/claude-haiku-5.5

## Supported parameters

Detailed capability metadata has not been reported for this model.

## Example

```ts
import { streamText } from 'ai'

const result = streamText({
  model: 'anthropic/claude-haiku-5.5',
  prompt: 'Why is the sky blue?'
})
```

## Links

- [Model page](https://vercel.com/ai-gateway/models/claude-haiku-5.5)
- [AI Gateway documentation](https://vercel.com/docs/ai-gateway)
- [Provider model documentation](https://platform.claude.com/docs/en/about-claude/models/overview)
- [Provider pricing](https://www.anthropic.com/pricing#anthropic-api)