One API for GPT, Claude, Gemini, and more

Use multiple leading AI models through one OpenAI-compatible endpoint. Integrate in minutes, monitor usage in one dashboard, and scale without juggling vendors.

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Free trial credits for new accounts. No long-term commitment.

🔄
OpenAI-compatible API
📊
Unified billing
📄
Usage logs
Fast support

Why Relay4AI

One platform to access, track, and switch between leading AI models.

🔗 One integration

Connect once with an OpenAI-compatible API and access multiple model providers through a familiar workflow.

💳 One billing flow

Track credits, requests, and spend in one place instead of splitting usage across different platforms.

🔀 One fallback layer

Switch models faster when you need better pricing, different quality, or provider redundancy.

Compatible with the tools you already use

Designed for teams already building with OpenAI-style SDKs and workflows. Keep your existing integration pattern and switch providers with minimal changes.

Chat Completions Streaming REST API OpenAI SDK Compatible

Make your first request in minutes

Works with familiar OpenAI-style request formats so your migration stays simple.

cURL Python Node.js
# Make your first request in minutes curl https://relay4ai.cloud/v1/chat/completions \ -H "Authorization: Bearer YOUR_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "model": "gpt-4o-mini", "messages": [ {"role": "user", "content": "Hello!"} ] }'

Drop-in compatible with OpenAI SDKs and tools.

Who Relay4AI is for

🎮 Indie developers

Ship faster without integrating multiple AI vendors one by one.

👥 Small teams

Use one endpoint to test, compare, and route across different models.

🌍 Global builders

Choose a simpler billing workflow and get support as usage grows.

Simple pricing

Start with free trial credits, then choose a plan based on usage. Transparent credits, clear top-up rules, and no hidden platform fees.

Starter

$9/month
11,000 credits
  • 12+ models
  • 1 API key
  • Email support
Start Free

Max

$99/month
140,000 credits
  • 12+ models
  • 20 API keys
  • Fast-track support
Start Free

Credits are deducted based on model usage. Exact per-model rates are listed on the pricing page.

Frequently asked questions

Do I need to change my existing OpenAI integration?

In most cases, only the base URL and API key need to change. Your existing code, SDKs, and request formats work as-is.

Can I access multiple models with one account?

Yes. Relay4AI gives you access to models from OpenAI, Anthropic, Google, DeepSeek, and more through a single account and API key.

How does billing work?

New accounts start with free trial credits. After that, you can subscribe to a monthly plan or top up with pay-as-you-go credits. All billing is visible in your dashboard.

Do you offer integration support?

Yes. We provide direct support for setup, migration, and integration questions. Reach out via email or the contact page.

Where can I see full pricing and supported models?

Complete pricing details and the model list are available on our public pricing page — no login required.