openrouter-free: Run Free LLMs in Your Apps

openrouter-free is a CLI and AI agent skill that routes LLM requests to free models on OpenRouter — DeepSeek R1, Qwen 3, Gemma 3 — with automatic fallback and caching. Built by Shahriar Labs, it eliminates per-request LLM costs for development, testing, and many production workloads. Zero vendor lock-in by design.

The Free Model Landscape in 2026

OpenRouter hosts dozens of free-tier models that are production-capable for many tasks. DeepSeek R1 matches GPT-4-class reasoning on benchmarks. Qwen 3 handles code and multilingual tasks well. Gemma 3 is fast for summarization and classification. The catch: free tiers have rate limits and occasional downtime — which is exactly the problem openrouter-free solves.

How It Works

openrouter-free maintains a live health-scored model registry. On each request:

1. Check cache — if this prompt was answered recently, return cached result instantly.
2. Route to highest-scored healthy free model for the requested capability.
3. On rate limit or timeout, fall back to the next model in priority order.
4. Update health scores based on response latency and success rate.

The model list auto-refreshes daily. New free models are discovered automatically and slotted into the routing table.

Use Cases

Development: Run all your local LLM calls through free models — no API bill during prototyping. Testing: Run evaluation suites against free models before switching to paid. Batch processing: Summarization, classification, and extraction jobs at zero marginal cost. Hybrid routing: Use free models for low-stakes paths, paid models only for critical decisions.

For vendor lock-in avoidance strategy, see our post on building LLM apps without vendor lock-in.

Frequently Asked Questions

What is openrouter-free?

A CLI and AI skill that routes LLM requests to free OpenRouter models with auto-fallback and caching.

Which models does it support?

DeepSeek R1, Qwen 3, Gemma 3, Mistral, and all free-tier OpenRouter models — auto-discovered daily.

How does fallback routing work?

It maintains health-scored model list; on rate limit or timeout, auto-routes to next healthy model.

Is it production-ready?

Yes for dev/test and low-stakes production. Pair with paid model fallback for critical paths.