The outcome

Select a model and provider policy based on measured quality, cost, latency, and privacy.

OpenRouter is a unified API and routing platform for AI models. Comparing and calling many AI models through one interface, aggregating billing, and routing across providers for availability, cost, performance, or privacy. This guide narrows that broad capability into one repeatable outcome, with checkpoints that keep the source material and your judgment in the loop.

Before you begin

Set the boundary before the tool starts.

Choose one real task, identify who will use the result, and decide what evidence or test will make the result acceptable. Gather only the source material needed for that task. If the work contains confidential, personal, regulated, or client-owned information, confirm that the platform and account are approved before sharing it.

Troiana principle

AI should make the work easier to inspect. If the workflow removes the source, the owner, or the review step, redesign the workflow.

Step by step

A workflow you can repeat.

  1. 01

    Define representative prompts, expected outputs, safety cases, context sizes, and a scoring rubric.

  2. 02

    Shortlist models that support the required modalities, tools, structured output, region, and context window.

  3. 03

    Run identical tests with fixed parameters and record quality, latency, token usage, errors, and effective cost.

  4. 04

    Inspect provider data policies and repeat tests with the routing and privacy constraints planned for production.

  5. 05

    Choose a primary and fallback set, document failure thresholds, and rerun the evaluation when models change.

Working standard

What good use looks like.

  • Use several realistic test cases.
  • Measure provider behavior, not only model labels.
  • Version the evaluation set.

OpenRouter proxies requests to model providers whose behavior and policies differ. Enforce privacy and provider constraints, protect API keys, monitor actual routing and cost, and test fallback outputs.

Official references

Check the current product documentation.

Features, plan limits, availability, and data controls change. These official pages are the starting points used for this collection.