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OpenRouter

AI & Machine Learning · AI Model Gateway

Unified API gateway to 100+ AI models from OpenAI, Anthropic, Google, Meta, and more. Many models available completely free with community credits.

No Credit CardForever Free100+ ModelsOpenAI Compatible
Duration

Forever (free models always available)

Credit Card

Not Required

Rating

4.6/5 (298)

Geo Restrictions

None

Rate Limits

Requests per Minute20 RPM
Requests per Day200 RPD
Tokens per Minute200,000 TPM
Other: Free models: 20 RPM, 200 RPD. Paid models: varies by credit balance.

Free Tier Details

✅ Included

  • Free models: LLaMA 3.1 8B, Gemma 2 9B, Phi-3, Qwen 2.5
  • OpenAI-compatible API format
  • Model routing & fallback
  • Usage analytics dashboard
  • Prompt caching

❌ Not Included

  • —Premium models (GPT-4o, Claude 3.5)
  • —Priority routing
  • —Custom rate limits

How to Get Your Free API Key

Sign up at openrouter.ai with email, Google, or GitHub.

https://openrouter.ai/auth

Go to Keys page and create a new API key.

https://openrouter.ai/keys

Browse the model list and filter by 'Free' to see all available free models.

https://openrouter.ai/models?q=free

How to Test Your Key

Send a request to a free model via OpenRouter.

curl https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"meta-llama/llama-3.1-8b-instruct:free","messages":[{"role":"user","content":"Hello!"}]}'

Expected: JSON response in OpenAI-compatible format.

Hidden Limitations

  • Free models have lower rate limits than paid ones
  • Free model availability can change
  • Response times may be slower on free tier during peak hours
  • Some free models are community-hosted and may have downtime

Official Links

DocumentationPricingDashboardWebsite

Last verified: 2026-02-14 · Last updated: 2026-02-14