LLM APIs · A-tier

OpenRouter

One API key for many models, with fallbacks. Useful when you do not want to marry one lab.

External model signals

OpenRouter publishes the token-usage rankings this directory reads for momentum. Arena’s blind votes inform capability for the models you can route. This page still scores OpenRouter the product. The boards’ numbers stay on their sites.

OpenRouter rankings. OpenRouter ranks models by tokens processed through the OpenRouter API. OpenRouter states that a higher token total shows how much a model is used, not which model is best for a task. That usage informs momentum.
Arena (LMArena leaderboard). Arena, also called LMArena, ranks models by blind human votes. People compare anonymous answers, and only those anonymous votes count toward the public board. Arena fits the votes with a Bradley-Terry model. Those votes inform capability. Method: Arena FAQ.

Checked 14 Oct 2026. The OpenRouter rankings page showed usage through 13 Oct 2026. Rankings data is licensed CC BY 4.0. The figures move, so StackPick links the boards. Rankings data: CC BY 4.0. How these boards enter the score.

Best for

Switching models without rewriting the client, or failing over when one lab is down.

What it is

OpenRouter is a router in front of many model providers. One API key can call models from several labs, and you can set fallbacks. You pay OpenRouter, which bills through to the underlying provider. It is the practical way to compare models without five accounts.

routermulti-modelapiLLM APIs

Score breakdown

Capability 40%84
Ease 25%88
Value 20%90
Momentum 15%86

Pricing

Freemium

Starting price: check site

Some models have a free endpoint with limits. Everything serious is usage-based. Check the model page for the rate.

Dates

Released 2023 (year precision).

Added to StackPick 14 Oct 2026.

Alternatives

A-tier · 80

Together AI

Serving and fine-tuning open weights without operating GPUs.

A-tier · 85

Groq

Chat and voice products where time-to-first-token is the constraint.

B-tier · 79

Fireworks

Production traffic on open models when you want serverless, not a cluster.

Comparisons

vs Groq

Questions

What is OpenRouter best for?

Switching models without rewriting the client, or failing over when one lab is down.

How much does OpenRouter cost?

Freemium. Starting price: check site. Some models have a free endpoint with limits. Everything serious is usage-based. Check the model page for the rate.

What are alternatives to OpenRouter?

Together AI, Groq, Fireworks are the alternatives we file next to it. Open a comparison when one exists.

How do model leaderboards relate to OpenRouter?

OpenRouter publishes the token-usage rankings StackPick reads for momentum (https://openrouter.ai/rankings). Arena’s blind votes (https://arena.ai) inform capability for the models you can route. This score is for OpenRouter the product. Figures stay on those sites.