OpenRouter

OpenRouter is a unified API and marketplace for large language models, letting developers and teams access hundreds of LLMs from providers like OpenAI, Anthropic, Google, Meta, Mistral, and others through a single OpenAI-compatible interface with one set of credits and analytics.

What It Does

• Single API endpoint for hundreds of LLMs across all major providers
• Automatic fallbacks and provider routing for higher uptime
• Pass-through pricing per model (prompt, completion, image, reasoning tokens)
• Free models, free models router, and a built-in chatroom for testing
• Bring Your Own Key (BYOK), management API keys, rankings, and usage analytics

Best For

• Developers building multi-model AI apps or agent systems
• Teams that want consolidated billing and analytics across many LLM providers
• Researchers benchmarking models or testing the latest releases in one place

Pricing

OpenRouter passes through each underlying model provider's per-token pricing with no markup on inference. A small fee is charged when purchasing credits (with a higher fee for crypto top-ups via Coinbase). BYOK requests are free up to a monthly threshold, then incur a percentage fee versus the on-platform rate. Free models are available with low daily rate limits. Per-model token prices are listed on the Models page.

Why It Stands Out

OpenRouter combines provider-neutral routing, pass-through pricing, and a single API surface, so teams can switch or fall back across LLMs without rewriting integrations or juggling multiple billing relationships.