# OpenRouter — Unified API for 200+ AI Models

> Single API to access 200+ AI models from OpenAI, Anthropic, Google, Meta, Mistral, and more. OpenAI-compatible format, automatic fallbacks, and usage-based pricing.

## Install

Save as a script file and run:

## Quick Use

```bash
export OPENROUTER_API_KEY=sk-or-...
curl https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -d '{"model": "anthropic/claude-sonnet-4-20250514", "messages": [{"role": "user", "content": "Hello"}]}'
```

---

## Intro

OpenRouter provides a single API endpoint to access 200+ AI models from every major provider. Use the OpenAI-compatible format you already know — just change the base URL and pick any model.

**Best for**: Model comparison, fallback routing, accessing multiple providers, cost optimization
**Works with**: Any tool supporting OpenAI API format

---

## Features

- **200+ models** from OpenAI, Anthropic, Google, Meta, Mistral, Cohere, etc.
- **OpenAI-compatible** — drop-in replacement, change one line of code
- **Automatic fallbacks** — if a model is down, route to alternatives
- **Usage-based pricing** — pay per token, no subscriptions
- **Rate limiting** — built-in handling across providers

## Usage with Python

```python
from openai import OpenAI

client = OpenAI(
    base_url="https://openrouter.ai/api/v1",
    api_key="sk-or-...",
)

response = client.chat.completions.create(
    model="anthropic/claude-sonnet-4-20250514",
    messages=[{"role": "user", "content": "Hello"}],
)
```

---



### FAQ

**Q: What is OpenRouter?**
A: Single API to access 200+ AI models from OpenAI, Anthropic, Google, Meta, Mistral, and more. OpenAI-compatible format, automatic fallbacks, and usage-based pricing.

**Q: How do I install OpenRouter?**
A: Check the Quick Use section above for step-by-step installation instructions. Most assets can be set up in under 2 minutes.

## Source & Thanks

> Created by [OpenRouter](https://openrouter.ai).
> [openrouter.ai](https://openrouter.ai) — Unified AI model access

---
Source: https://tokrepo.com/en/workflows/7ff8e91c-8e21-42ae-a2f8-3b3938e9a203
Author: Script Depot