OpenRouter — LLM Gateways Platform
LLM GatewaysLayer 1Free tier + pay-as-you-go (passthrough + 5.5% fee)What is OpenRouter?
OpenRouter is a unified LLM gateway that routes requests to the best available provider for each model, with a single API key giving access to 300+ models from OpenAI, Anthropic, Google, Meta, Mistral, Cohere, and dozens of smaller providers. It exposes an OpenAI-compatible API, so any existing OpenAI SDK code works unchanged.
Two pricing tiers: a Free tier (25+ free-of-charge models, 50 requests/day, 20 RPM, raised to 1,000/day after $10+ in credits) and Pay-as-you-go (300+ models, passthrough provider rates, 5.5% platform fee on credit-card purchases / 5% on crypto). OpenRouter adds ~25-40ms latency over direct provider calls in typical conditions.
Major use cases: avoiding vendor lock-in across OpenAI/Anthropic/Google, fallback routing when a provider is down, cost optimization across price-equivalent models, and tracking spend per API key. Free credits expire after 365 days. As of 2026, OpenRouter is the most-used model gateway for AI startups and indie developers building model-agnostic applications.
Key Features
- ✓300+ models across 60+ providers via one OpenAI-compatible API
- ✓Automatic routing to best available provider (latency, price, uptime)
- ✓Per-API-key spend tracking and rate limiting
- ✓Free tier: 25+ models, 50-1,000 req/day depending on credits
- ✓BYO API key for select providers (no markup)
Pros & Cons
Pros
- +Largest model catalog in the gateway space — 300+ models
- +OpenAI-compatible API drops in with zero code change
- +Reasonable platform fee — 5.5% over passthrough rates
- +Per-key spend tracking and isolated rate limits
- +Active free tier viable for prototyping
Cons
- -Adds ~25-40ms latency over direct provider calls
- -Credits expire after 365 days
- -5.5% fee + $0.80 minimum charge stings on small purchases
- -Free models can be flaky — timeouts and required cooldowns
OpenRouter Pricing
Free trial available
- ✓Access to 25+ free models
- ✓50 requests/day (1,000 with $10+ credits)
- ✓20 requests/minute
- ✓OpenAI-compatible API
- ✓300+ models, 60+ providers
- ✓Passthrough provider rates + 5.5% credit-card fee
- ✓5% fee on crypto purchases
- ✓Per-API-key spend tracking
- ✓Credits expire after 365 days
Common Use Cases
Developers and teams who want one API for hundreds of LLMs without provider lock-in
- •Model-agnostic AI apps that swap providers freely
- •Fallback routing when a primary provider is degraded
- •Cost optimization across price-equivalent models
- •Side-by-side model comparison from a single API
- •Multi-tenant apps with per-tenant spend tracking
Using OpenRouter with Respan
OpenRouter and Respan enable multi-provider AI access with unified monitoring. Route requests across 290+ models with OpenRouter while tracking costs and performance with Respan.
- ✓Track costs across multiple LLM providers through OpenRouter unified gateway
- ✓Monitor routing decisions and fallback patterns to optimize provider selection
- ✓Compare performance across different models and providers using Respan analytics
- ✓Identify cost savings opportunities by analyzing provider-specific usage patterns
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Last verified: April 29, 2026