Name: Claude 4.5 Haiku API
Brand: Anthropic

Overview

What is Claude 4.5 Haiku API?

Claude 4.5 Haiku is a fast, lightweight model optimized for quick responses and high-throughput applications.

Technical Specifications
- Supported inputs: Text
- Output: Text
- Context window: 200,000 tokens / Max output: 64,000 tokens
- Endpoint: /chat/completions

Performance Benchmarks
[embed]

Claude 4.5 Haiku API Pricing
- Input: $1.3 / 1M tokens
- Output: $6.5 / 1M tokens

Where to Use Claude 4.5 Haiku

Coding and code review
Generate, debug, and review code across languages, reading whole files or repos in a single prompt.

Long-document analysis
Summarize and extract from contracts, papers, and reports without aggressive chunking.

Code Sample
[embed]

Uptime and performance

Uptime (24h): 100%
Uptime (7d): 100%
Availability (24h): 100%
Error rate (24h): 0%
End-to-end latency (24h median): 3.5s
Time to first token (24h median): 952ms
Throughput (24h median): 47.8 tok/s

Measured on the AI/ML API gateway across live traffic. Figures are medians unless stated. Last updated 2026-10-12.

Use cases

Real-time chat assistants and conversational AI services
Customer support automation with low latency response
AI pair programming and code generation
Agent orchestration for complex workflows involving multiple AI instances
Rapid prototyping of software with interactive AI support

‍

How to use Claude 4.5 Haiku API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to anthropic/claude-haiku-4.5.

import requests

r = requests.post(
    "https://api.aimlapi.com/v1/chat/completions",
    headers={"Authorization": "Bearer " + AIMLAPI_KEY},
    json={
      "model": "anthropic/claude-haiku-4.5",
      "messages": [
        {
          "role": "user",
          "content": "Hello!"
        }
      ]
    },
)
print(r.json())

const r = await fetch("https://api.aimlapi.com/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "anthropic/claude-haiku-4.5",
    "messages": [
      {
        "role": "user",
        "content": "Hello!"
      }
    ]
  }),
});
console.log(await r.json());

curl -X POST https://api.aimlapi.com/v1/chat/completions \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"anthropic/claude-haiku-4.5","messages":[{"role":"user","content":"Hello!"}]}'

OpenAI-compatible — swap the base URL and it works with your existing SDK.