Claude Sonnet 4

by Anthropic · 200k context · flagship

Best balance of intelligence and speed in the Claude family. Strong coding abilities, reliable instruction following, and excellent for production use cases.

Use Claude Sonnet 4 →

Pricing Comparison

Per 1 million tokens

	Official (Anthropic)	NeatAPI	You Save
Input Tokens	$3.00	$2.85	$0.15
Output Tokens	$15.00	$14.25	$0.75

That's 5% savings on every API call. See full pricing →

Code Examples

Drop-in replacement — just change the base URL and API key.

Python (OpenAI SDK)

from openai import OpenAI

client = OpenAI(
    base_url="https://api.neatapi.ai/v1",
    api_key="your-neatapi-key"
)

response = client.chat.completions.create(
    model="claude-sonnet-4",
    messages=[
        {"role": "user", "content": "Hello, world!"}
    ]
)
print(response.choices[0].message.content)

Node.js

import OpenAI from 'openai';

const client = new OpenAI({
  baseURL: 'https://api.neatapi.ai/v1',
  apiKey: 'your-neatapi-key'
});

const response = await client.chat.completions.create({
  model: 'claude-sonnet-4',
  messages: [
    { role: 'user', content: 'Hello, world!' }
  ]
});
console.log(response.choices[0].message.content);

cURL

curl https://api.neatapi.ai/v1/chat/completions \
  -H "Authorization: Bearer your-neatapi-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-4",
    "messages": [
      {"role": "user", "content": "Hello, world!"}
    ]
  }'