Using OpenRouter With Roo Code

OpenRouter is an AI platform that provides access to a wide variety of language models from different providers, all through a single API. This can simplify setup and allow you to easily experiment with different models.

Website: https://openrouter.ai/

Getting an API Key

1. Sign Up/Sign In: Go to the OpenRouter website. Sign in with your Google or GitHub account.
2. Get an API Key: Go to the keys page. You should see an API key listed. If not, create a new key.
3. Copy the Key: Copy the API key.

Supported Models

OpenRouter supports a large and growing number of models. Roo Code automatically fetches the list of available models. Refer to the OpenRouter Models page for the complete and up-to-date list.

Configuration in Roo Code

1. Open Roo Code Settings: Click the gear icon () in the Roo Code panel.
2. Select Provider: Choose "OpenRouter" from the "API Provider" dropdown.
3. Enter API Key: Paste your OpenRouter API key into the "OpenRouter API Key" field.
4. Select Model: Choose your desired model from the "Model" dropdown.
5. (Optional) Custom Base URL: If you need to use a custom base URL for the OpenRouter API, check "Use custom base URL" and enter the URL. Leave this blank for most users.

Supported Transforms

OpenRouter provides an optional "middle-out" message transform to help with prompts that exceed the maximum context size of a model. You can enable it by checking the "Compress prompts and message chains to the context size" box.

Tips and Notes

• Model Selection: OpenRouter offers a wide range of models. Experiment to find the best one for your needs.
• Pricing: OpenRouter charges based on the underlying model's pricing. See the OpenRouter Models page for details.
• Prompt Caching:
  • OpenRouter passes caching requests to underlying models that support it. Check the OpenRouter Models page to see which models offer caching.
  • For most models, caching should activate automatically if supported by the model itself (similar to how Requesty works).
  • Exception for Gemini Models via OpenRouter: Due to potential response delays sometimes observed with Google's caching mechanism when accessed via OpenRouter, a manual activation step is required specifically for Gemini models.
  • If using a Gemini model via OpenRouter, you must manually check the "Enable Prompt Caching" box in the provider settings to activate caching for that model. This checkbox serves as a temporary workaround. For non-Gemini models on OpenRouter, this checkbox is not necessary for caching.