# Anthropic Claude Haiku 5.5 API

> Claude Haiku 5.5 is Anthropic's small, fast model for high-volume, cost-sensitive work such as summarization, classification, compaction, subagents, and browser use. It succeeds Claude Haiku 4.5 with stronger coding, computer use, and knowledge work, adds an adjustable effort setting, and accepts text, image, and file input with a 1M-token context window.

Source: https://www.sandbase.ai/models/anthropic/claude-haiku-5.5
API reference: https://www.sandbase.ai/models/anthropic/claude-haiku-5.5/docs

## Facts

- Provider: Anthropic
- Type: Language model
- Model ID: `anthropic/claude-haiku-5.5`
- Price: $0.10 per 1M input tokens, $0.50 per 1M output tokens
- Context window: 1M tokens, up to 128K output tokens
- Capabilities: chat, vision, reasoning, structured output, function calling
- Billing: pay per use from one SandBase balance; no provider account or subscription needed

## Call it

- Chat Completions API: `POST https://api.sandbase.ai/v1/chat/completions`
- Messages API: `POST https://api.sandbase.ai/v1/messages`

```bash
curl -X POST https://api.sandbase.ai/v1/chat/completions \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "anthropic/claude-haiku-5.5",
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ],
  "max_tokens": 2048
}'
```

## FAQ

### How do I call Anthropic Claude Haiku 5.5 through SandBase?

Create a SandBase API key, then send requests with the model ID "anthropic/claude-haiku-5.5" to Chat Completions API (/v1/chat/completions) or Messages API (/v1/messages) at https://api.sandbase.ai. The request examples on this page show the exact payload.

### How much does Anthropic Claude Haiku 5.5 cost?

$0.10 per 1M input tokens and $0.50 per 1M output tokens, billed per request from your SandBase balance. Discounts, when available, are shown in the pricing on this page.

### What is the context window of Anthropic Claude Haiku 5.5?

1M tokens of context, with up to 128K output tokens per response.

### Which features does Anthropic Claude Haiku 5.5 support?

Anthropic Claude Haiku 5.5 supports vision (image input), reasoning, function calling, structured output. See Specifications above for the full list.

### Do I need a separate Anthropic account?

No. One SandBase API key and balance gives you access to Anthropic Claude Haiku 5.5 and the other models in the catalog; you do not need to sign up with Anthropic separately.