OpenRouter
OpenRouter provides unified API access to multiple AI models, including free and pay-as-you-go options for popular LLMs. · OpenRouter · AI
Overview
OpenRouter offers a unified API for accessing multiple AI models, making it easy to experiment and prototype with free-tier LLMs.
Good fit
Use OpenRouter when you want to access multiple AI models through a single API with a free tier for experimentation or prototyping.
- prototyping
- model evaluation
- student projects
Not a fit
Avoid if you need guaranteed access to premium models or require strict SLAs for production workloads.
- need enterprise SLAs
- require specific premium models
- need high-volume production use
Quickstart · 5 steps
- Sign up for a free OpenRouter account.
- Obtain your API key from the dashboard.
- Review the list of free models and their limits.
- Integrate the OpenRouter API into your application using the provided endpoint.
- Monitor your usage in the dashboard to stay within free tier limits.
Other free ai options
Free tierWhat you get freeRiskCard
GitHub · AI
2,000 code completions per month · 50 chat requests per month (including Copilot Edits) · Agent mode, CLI, and MCP servers included with limited usage
Billing risk: None
No card
Google Cloud · AI
Sessions run up to 12 hours, depending on availability · GPU/TPU access heavily restricted on the free tier · Exact resource limits are not published and vary over time
Billing risk: None
No card
Google Cloud · AI
Free input and output tokens on supported models · Limited access to certain models · 5,000 free Google Search grounding requests/month, shared across Gemini 3.x models
Billing risk: None
No card
Hugging Face · AI
Unlimited public repos (best-effort free storage) · 100GB private storage · Storage limits apply across models, datasets, and buckets
Billing risk: None
No card