OpenRouter

OpenRouter is a unified interface for hundreds of LLMs. It aggregates multiple providers into a single OpenAI-compatible API.

🚀 Key Specs (Feb 2026)

• Free Model Inventory: 24+ models including Llama 3.3 70B, Gemini 2.0 Flash Exp, GPT-OSS 120B, MiMo-V2, Qwen 3 Coder.
• Context Window: Variable (up to 1M with Gemini).
• Default Rate Limit: 20 RPM / 50 RPD (Free-only account).
• Escalation Path: One-time $10 top-up increases daily limit to 1,000 requests.
• Universal Gateway: Single OpenAI-compatible endpoint for falling back across providers.

🗝 Setup

1. Sign up at OpenRouter.ai.
2. Go to Keys and create a temporary secret key.
3. Check Models -> filter by “Free” to see models you can call without credits.

🛠 Usage Example (OpenAI library)

from openai import OpenAI
 
client = OpenAI(
  base_url="https://openrouter.ai/api/v1",
  api_key="YOUR_OPENROUTER_KEY",
)
 
completion = client.chat.completions.create(
  model="liquid/lfm-40b:free",
  messages=[{"role": "user", "content": "What is OpenRouter?"}]
)
print(completion.choices[0].message.content)

🔗 Reference

• OpenRouter Models
• Documentation