Jenny Met

Posted on Mar 11 • Originally published at hot-mandible-aab.notion.site

How to Access 627+ AI Models with One API Key in 2026

#ai #api #openai #tutorial

Managing API keys across OpenAI, Anthropic, Google, and DeepSeek is painful. Different billing, different SDKs, different rate limits. Here's how I consolidated everything into one API key using an AI API gateway.

The Problem

If you're building with multiple AI models, you probably have:

An OpenAI account for GPT-5
An Anthropic account for Claude Sonnet 4.6
A Google Cloud project for Gemini 2.5 Pro
A DeepSeek account for V3.2

That's 4 billing systems, 4 API keys, 4 different error handling patterns. And when you want to add image generation (DALL-E, Flux, Midjourney) or video (Veo3, Sora), it gets worse.

The Solution: AI API Gateway

An API gateway sits between your app and all providers. You use one endpoint and one key. The gateway handles routing, load balancing, and billing.

I've been using Crazyrouter for this. It gives access to 627+ models from 20+ providers through a single API key.

Setup (2 Minutes)

Step 1: Get your API key

Step 2: Change two lines of code

Python (OpenAI SDK):

from openai import OpenAI

client = OpenAI(
    api_key="your-crazyrouter-key",       # Changed
    base_url="https://crazyrouter.com/v1"  # Changed
)

# Everything else stays the same
response = client.chat.completions.create(
    model="gpt-5",
    messages=[{"role": "user", "content": "Hello!"}]
)
print(response.choices[0].message.content)

Node.js:

import OpenAI from 'openai';

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

const response = await client.chat.completions.create({
  model: 'claude-sonnet-4-6',
  messages: [{ role: 'user', content: 'Hello!' }]
});

curl:

curl https://crazyrouter.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer your-crazyrouter-key" \
  -d '{
    "model": "gemini-2.5-pro",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Step 3: Switch models freely

Just change the model parameter:

# GPT-5
client.chat.completions.create(model="gpt-5", messages=[...])

# Claude Sonnet 4.6
client.chat.completions.create(model="claude-sonnet-4-6", messages=[...])

# Gemini 2.5 Pro
client.chat.completions.create(model="gemini-2.5-pro", messages=[...])

# DeepSeek V3.2
client.chat.completions.create(model="deepseek-v3.2", messages=[...])

# Image generation
client.images.generate(model="dall-e-3", prompt="A sunset over mountains")

Using with Anthropic SDK

If you prefer the native Anthropic Messages API:

import anthropic

client = anthropic.Anthropic(
    api_key="your-crazyrouter-key",
    base_url="https://crazyrouter.com"  # Note: no /v1
)

message = client.messages.create(
    model="claude-sonnet-4-6",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello!"}]
)

Using with Cursor IDE

Open Cursor Settings → Models
Add custom OpenAI-compatible provider
Set base URL: https://crazyrouter.com/v1
Enter your Crazyrouter API key
Now you can use any of 627+ models in Cursor

Using with LangChain

from langchain_openai import ChatOpenAI

llm = ChatOpenAI(
    model="gpt-5",
    api_key="your-crazyrouter-key",
    base_url="https://crazyrouter.com/v1"
)

response = llm.invoke("Explain quantum computing")

What's Supported

Capability	Status
Chat Completions	✅ Full support
Streaming (SSE)	✅ Full support
Function Calling	✅ Full support
Vision (image input)	✅ Full support
Structured Output	✅ Full support
Image Generation	✅ DALL-E, Flux, Midjourney
Video Generation	✅ Veo3, Kling, Sora
TTS / STT	✅ Full support
Embeddings	✅ Full support

Available Models (Top 20)

Provider	Models	Count
Google	Gemini 3 Pro/Flash, 2.5 Pro/Flash, Veo3	110
OpenAI	GPT-5, 5.2, 5.3-Codex, o3, o4-mini	107
Midjourney	Full suite (imagine, blend, upscale)	93
Alibaba	Qwen3-235B, Qwen3-Coder, Qwen3-Max	68
ByteDance	Doubao-Seed-1-8, Seedance, Seedream	52
DeepSeek	V3.2, R1, V3.1, OCR, Search	30
Anthropic	Claude Opus 4.6, Sonnet 4.6, Haiku 4.5	22
xAI	Grok 4, 4.1, 4-Fast	9

Total: 627+ models across 102 families.

Environment Variables

For zero-code migration, just set environment variables:

export OPENAI_API_KEY=your-crazyrouter-key
export OPENAI_BASE_URL=https://crazyrouter.com/v1

Any tool that reads these variables (most do) will automatically use Crazyrouter.

Pricing

Pay-as-you-go, no monthly fees, no minimum spend. Credits never expire. Lower than official pricing on most models. Check crazyrouter.com/pricing for current rates.

Have questions? Join the Telegram community or check the docs.

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