Claude Haiku 5.5

Anthropic's fastest, most cost-efficient model for low-latency assistants and high-volume automation.

FastCost EfficientLow Latency

Context Window

1M tokens

claude-haiku-5-5

Max Output

1M tokens

Input

$0.09$0.10

10% off

1M tokens

Output

$0.45$0.50

10% off

1M tokens

Model Codeclaude-haiku-5-5

Playground

Model Code

claude-haiku-5-5

Enter your prompt here...

Output

No output yet

Pricing

Plan	Context Window	Max Output	Input	Output	Cache Write	Cache Read
claude-haiku-5-5	1M tokens	-	$0.09$0.1010% off 1M tokens	$0.45$0.5010% off 1M tokens	$0.1125$0.12510% off 1M tokens	$0.009$0.0110% off 1M tokens
Long Context	-	-	$0.45$0.5010% off 1M tokens	$2.25$2.5010% off 1M tokens	$0.5625$0.62510% off 1M tokens	$0.045$0.0510% off 1M tokens

Cache Write 1h · $0.18 · 1M tokens

Long Context Cache Write 1h · $0.9 · 1M tokens

Applies to the full request when the prompt exceeds 100,000 tokens

Cache read or cached input pricing applies to reused prompt tokens.

README

Claude Haiku 5.5 is Anthropic's cost-efficient model for low-latency assistants and high-volume automation, with $0.10/$0.50 pricing and prompt caching.

Claude Haiku 5.5 is built for low-latency assistants, customer service systems, and high-volume automation where cost and response time matter.
It pairs fast, cost-efficient text generation with prompt caching for lower repeated-context costs.
ReachAPI exposes the model through the `claude-haiku-5-5` model code over the Claude Messages protocol.

API

Use the API docs for request format, parameters, and integration details.

Anthropic's fastest, most cost-efficient model for low-latency assistants and high-volume automation.

Model Code

claude-haiku-5-5

View API Docs

API

Endpoint

POST /v1/messages

Authentication

Authorization: Bearer YOUR_REACH_API_KEY
anthropic-version: 2023-06-01
Content-Type: application/json

Example

curl -X POST "https://direct.reachapi.ai/v1/messages" \
  -H "Authorization: Bearer YOUR_REACH_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "YOUR_MODEL_ID",
    "messages": [
      {
        "role": "user",
        "content": "Introduce ReachAPI in one sentence."
      }
    ],
    "max_tokens": 512,
    "temperature": 0.2
  }'

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