Claude Sonnet 4 (Thinking)

by Anthropic · chat

Claude Sonnet 4 (Thinking) by Anthropic — Access via Apertis API. Input: $0.0010/1M tokens, Output: $0.0050/1M tokens. Context: 200K tokens. OpenAI-compatible API with 50% cost savings.

Pricing

InputOutputContext Window
$0.0010 / 1M tokens$0.0050 / 1M tokens200K tokens

Quick Start

Use the Apertis API (OpenAI-compatible) to access Claude Sonnet 4 (Thinking):

curl https://api.apertis.ai/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "claude-sonnet-4-20250514-thinking", "messages": [{"role": "user", "content": "Hello!"}]}'

Features