OpenAI-Compatible API
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Cheap OpenAI-Compatible API for AI Builders

Access powerful LLM inference through our distributed infrastructure. Fast, reliable, and cost-effective AI processing for your applications.

Lightning fast
Simple REST API
Production-ready
Pay as you go

Why GPU AI

Built for developers who need reliable, affordable AI inference

Cheaper at Scale

OpenAI, Anthropic, Gemini, Groq, Together, Fireworks — all get expensive at volume. Our distributed infrastructure undercuts everyone as usage grows.

Stable, Predictable Behavior

Most APIs have silent model updates, behavior drift, and unclear versioning. Our open-source models deliver consistent behavior for agents, RAG, and production apps.

Control: Open Models, Customizable, Auditable

Unlike closed APIs, you get full model choice, auditability, local reproducibility, fine-tuning paths, and no ToS lock-in.

Lower Vendor Risk + Built-In Reliability

Avoid outages, rate limits, quota caps, regional issues, and model deprecations. Distributed network with automatic fallback keeps you running.

Get Started in 3 Steps

From signup to first API call in under 10 minutes

1

Get API Key

Sign up instantly — no credit card required. Get your free API key.

2

Choose Model

Pick from Phi-3, Mistral, Llama 3, or Mixtral based on your needs.

3

Start Building

Call our /infer endpoint and start getting results in seconds.

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No credit card required • Setup in minutes

API Documentation

Choose your preferred API style. We support native, OpenAI-compatible, and Claude-compatible endpoints.

Model names (e.g., gpt-3.5-turbo, claude-3-5-sonnet) automatically map to equivalent open-source models (Mistral, Llama, Phi-3) for seamless compatibility.

Endpoint: POST /api/v1/chat/completions

Drop-in replacement for OpenAI. Just change the base URL.

Python
from openai import OpenAI

client = OpenAI(
    api_key="YOUR_API_KEY",
    base_url="https://gpuai.app/api/v1"
)

response = client.chat.completions.create(
    model="gpt-3.5-turbo",
    messages=[
        {"role": "user", "content": "Hello!"}
    ],
    max_tokens=200
)

print(response.choices[0].message.content)
base_url — Change this from default OpenAI URL
JavaScript
import OpenAI from 'openai';

const client = new OpenAI({
  apiKey: 'YOUR_API_KEY',
  baseURL: 'https://gpuai.app/api/v1'
});

const response = await client.chat.completions.create({
  model: 'gpt-3.5-turbo',
  messages: [
    { role: 'user', content: 'Hello!' }
  ],
  max_tokens: 200
});

console.log(response.choices[0].message.content);
baseURL — Change this from default OpenAI URL
cURL
curl https://gpuai.app/api/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-3.5-turbo",
    "messages": [{"role": "user", "content": "Hello!"}],
    "max_tokens": 200
  }'
https://gpuai.app/api/v1 — Change this from https://api.openai.com/v1

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Simple, token-based pricing

Pay only for tokens processed. No GPU rental, no container runtime billing, no surprise infra invoices.

ModelInput / 1M TokensOutput / 1M TokensBest For
Phi-3-mini$0.15$0.20Chatbots, small apps, background tasks
Mistral-7B $0.30$0.60Production apps, tools, Discord bots, SaaS
Llama-3-8B-Instruct$0.60$1.20Enterprise apps, automation, code, reasoning

All tiers include automatic retries and fallback to cloud providers when GPU supply is saturated.

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How we compare to other providers

Every major AI provider gets expensive at scale or has reliability issues. Here's how we're different.

ProviderCost at ScaleModel StabilityOpen SourceReliability
OpenAI / Anthropic / Gemini❌ Expensive❌ Silent updates, behavior drift❌ Closed⚠️ Outages, rate limits
Groq / Together / Fireworks⚠️ Costly at volume⚠️ Some versioning issues⚠️ Limited open models⚠️ Quota caps, regional limits
RunPod / Vast / HuggingFace⚠️ DIY complexity✅ You control versions✅ Open source❌ You manage infrastructure
GPU AI✅ Up to 90% cheaper at scale✅ Stable, predictable behavior✅ Full open-source choice✅ Distributed network + fallback

Frequently Asked Questions

Everything you need to know about GPU AI

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