OpenRouter Evals
OpenRouter gives you access to 1,000+ models with a single API key. Evvl lets you compare any of them side by side to find the best model for your task.
Why Evaluate with OpenRouter?
OpenRouter aggregates models from OpenAI, Anthropic, Google, Meta, Mistral, DeepSeek, and dozens of other providers into a single API. Instead of managing separate accounts and API keys for each provider, you can test models from all of them through one interface.
Combined with Evvl, this means you can compare any model against any other model, across any provider, without signing up for multiple services.
Common OpenRouter Evaluations
OpenRouter is especially useful for these types of comparisons that would otherwise require multiple provider accounts.
Frontier Model Showdown
Compare GPT-4.1, Claude Sonnet, and Gemini Pro on the same prompt without switching between three different APIs. One key, one prompt, three results.
Good for: Choosing a primary provider for your project
Open Source vs Closed Source
Test Llama, Mistral, Qwen, and DeepSeek against commercial models. OpenRouter hosts many open source models, so you can compare without running anything locally.
Good for: Evaluating if open source is good enough for your use case
Cost Optimization
OpenRouter shows pricing per model. Compare a $15/M token model against a $0.50/M token model on your actual prompts to see if the cheaper option is good enough.
Good for: Reducing API costs without sacrificing quality
Specialized Model Discovery
OpenRouter offers coding-specific models, multilingual models, and other specialized options. Compare them against general-purpose models to see if a specialist outperforms on your task.
Good for: Finding niche models you wouldn't otherwise know about
How to Evaluate OpenRouter Models with Evvl
- 1 Add your OpenRouter API key
Get one from openrouter.ai. Free credits are available for new users. Your key is stored locally.
- 2 Pick models from any provider
Select from OpenRouter's full catalog. Mix frontier models, open source, and budget options in the same evaluation.
- 3 Write your prompt and run
Use your real prompts, the ones you'd actually use in production. Evvl sends the same prompt to every selected model simultaneously.
- 4 Compare results side by side
See every response at once instead of switching tabs or copy-pasting between windows.
Frequently Asked Questions
Why use OpenRouter instead of direct provider APIs?
One API key gives you access to models from every major provider. This is useful for evaluation because you can compare models across providers without managing multiple accounts. For production use, you might still want direct API access for lower latency and cost.
Can I mix OpenRouter models with direct provider APIs?
Yes. In Evvl, you can configure multiple providers at once. Use your OpenRouter key for broad model access and your direct API keys for specific providers. Compare results from both in the same evaluation.
Is my API key safe?
Your API key is stored locally in your browser and never saved on our servers. OpenRouter enables CORS, so calls go directly from your browser to OpenRouter with no proxy needed.
Compare 1,000+ models
Find the best model for your task by testing across providers. No login required.
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