A practical way to use free LLM APIs.
A free LLM API lets your application send prompts to a hosted language model within a provider’s free allowance. Free AI Router connects keys you obtain from those providers to a single Chat Completions endpoint.
Where do free API keys come from?
Create an account with an upstream provider and generate a key in its console. Groq, OpenRouter and NVIDIA NIM are supported presets; other public HTTPS OpenAI-compatible providers can be added manually. Availability, verification requirements and free eligibility depend on the provider and your account.
Free allowance, trial credits, and promotions
Recurring free allowances renew on a daily, weekly or monthly schedule. One-time trial credits run out. Promotional model access can end without a replacement. Confirm which applies before you add a model; the word “free” in a directory does not establish ongoing access.
Connect your providers to one endpoint
Add an upstream API base URL, your provider key and exact eligible model IDs. Set conservative request caps, then create a unified API key for your application. The router supports text Chat Completions, streaming responses, and priority-based fallback.
What happens when a free tier runs out?
The router skips connections that reached your configured RPM or daily request cap. An upstream rate limit puts that connection into cooldown. With model auto, the next connection may use a different model; an exact model ID only routes to connections configured with the same ID.
Is a free LLM API unlimited?
Free services have quotas, availability constraints or fair-use rules. Combining connections does not remove those rules. This router counts requests, not all provider token or credit budgets. Check token-based caps upstream and disable paid overages in your provider account.