Claude CodeGPT APITutorial

How to Use Claude Code and the GPT API Affordably

2026-04-13

The Problem: AI APIs Are Expensive

If you're a developer using Claude Code, Cursor, or building with AI APIs, you know the costs add up fast:

ServiceCostLimitation
Claude Pro$20/monthRate limited, no API access
Anthropic API (Sonnet)$3/$15 per M tokensRequires credit card, region restrictions
OpenAI API (GPT-5.5)$5/$30per M tokensSame issues
APIVAIOver 50% below official ratesNo subscription, no restrictions

Current per-model rates are always on our live pricing page.

What is APIVAI?

APIVAI is an AI API gateway that gives you access to the same Claude and GPT models through a single, OpenAI-compatible API:

  • All models, one API key — Claude Fable 5, Opus 4.8, Opus 4.7, Opus 4.6, Sonnet 5, Sonnet 4.6, Haiku 4.5, GPT-5.5
  • Over 50% cheaper than official API pricing
  • No subscription — pay per token, starting from $10
  • No VPN needed — works from anywhere
  • Drop-in replacement — change one URL, everything else stays the same

How to Use with Claude Code

Just set two environment variables:

Mac/Linux:

ANTHROPIC_AUTH_TOKEN="your-apivai-key" \
ANTHROPIC_BASE_URL="https://api.apivai.com" \
claude

Windows PowerShell:

$env:ANTHROPIC_AUTH_TOKEN="your-apivai-key"
$env:ANTHROPIC_BASE_URL="https://api.apivai.com"
claude

Same Claude Code experience, over 50% cheaper.

How to Use with Cursor

Go to Cursor Settings > Models > Override OpenAI Base URL and set:

https://api.apivai.com/v1

Real Cost Comparison

Usage PatternOfficial APIAPIVAI
Casual (50 msgs/mo)$1.75Less than half
Daily user (20 msgs/day)$12.25Less than half
Developer (10M tokens/mo)$45+Less than half

No monthly fee. Pay only for what you use. See the pricing page for today's exact rates.

API Compatibility

Works with any OpenAI-compatible tool: Claude Code, Cursor, Continue, Aider, Open Interpreter, and more.

from openai import OpenAI
client = OpenAI(
    api_key="your-apivai-key",
    base_url="https://api.apivai.com/v1"
)
response = client.chat.completions.create(
    model="claude-sonnet-4-6",
    messages=[{"role": "user", "content": "Hello!"}]
)

Get Started

  1. Sign up at apivai.com — email + verification code
  2. Top up — from $10 by card or crypto, or ¥20 by Alipay / WeChat Pay
  3. Create an API key on the Dashboard
  4. Set the base URL — https://api.apivai.com for Claude Code, https://api.apivai.com/v1 for Cursor and OpenAI-compatible tools — and start coding

No subscription. No VPN. No restrictions.

Ready to start?

Get your API key in 30 seconds. Pay as you go for Claude and GPT.