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

# Claude Haiku 5.5

> Anthropic's fastest model, for high-volume, latency-sensitive work such as classification, extraction, routing and subagents; succeeds Claude Haiku 4.5. 1M context, 128K output, vision, file input, prompt caching, adaptive thinking. Prompts over 100,000 tokens bill at a higher rate.

## Overview

Anthropic's fastest model, for high-volume, latency-sensitive work such as classification, extraction, routing and subagents; succeeds Claude Haiku 4.5. 1M context, 128K output, vision, file input, prompt caching, adaptive thinking. Prompts over 100,000 tokens bill at a higher rate.

## Specs

| Field | Value |
| - | - |
| Model ID | `claude-haiku-5.5` |
| Best for | Voice agents, real-time UX, bulk classification, subagents, fast tool use |
| Context window | 1M |
| Max output tokens | 128K |
| Input modalities | Text, Image, File |
| Output modalities | Text |
| Tool calling | Yes |
| Structured outputs | Yes |
| Prompt caching | Yes |
| Vision | Yes |
| Reasoning | Yes |
| Speed | Fast |
| Cost band | Cheap |
| Release stage | Stable |

## Pricing

| | Per 1M tokens |
| - | :-: |
| Input | \$0.135 |
| Output | \$0.675 |

Above a long prompt this model costs more per token, because the infrastructure
serving it charges more there. The threshold is on the **prompt**, so you know which
rate applies before you send.

| Prompt length | Input | Output |
| - | :-: | :-: |
| Standard | \$0.135 | \$0.675 |
| From 100,001 tokens | \$0.675 | \$3.375 |

## Example

```python theme={null}
from openai import OpenAI

client = OpenAI(base_url="https://kymaapi.com/v1", api_key="kyma-...")

response = client.chat.completions.create(
    model="claude-haiku-5.5",
    messages=[{"role": "user", "content": "..."}],
    tools=[...],  # function calling supported
)
```

## Agent query example

Ask the API which models fit, instead of hardcoding an id:

```bash theme={null}
curl "https://kymaapi.com/v1/models?recommended_for=chat&tools=true&quality_tier=strong"
```


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