Run your real prompts through several models side by side and compare quality, speed and cost per request before you commit.
Which AI model should my app use? Compare them on my actual prompts
How it works
- Collect your real prompts: Vovy pulls the prompts your app sends from your code, plus 5 to 10 realistic user inputs to test with.
- Shortlist models: Vovy picks a small, a mid and a top-tier model across providers, based on your task, like chat, summarizing, extraction or code.
- Run them side by side: Vovy sends every test input to each model through OpenRouter, so one key covers them all, and records the replies, latency and tokens.
- Score the answers: Vovy shows replies side by side for you to judge, and marks obvious failures like wrong format or made-up facts.
- Recommend a model: A table shows quality, seconds to first token and cost per 1,000 requests, with a recommendation and a cheaper fallback.
What you provide
- Your app's prompts or code
- An OpenRouter or provider API key
- What good output looks like
What you get
- A side-by-side output comparison
- Cost and speed per model
- A recommended model and fallback
FAQ
Isn't the biggest model always best?
No. For many tasks a smaller model is just as good, several times faster, and much cheaper.
How much does this test cost?
Usually a few dollars or less, since it is a few dozen requests.
Will models change after I pick one?
Yes, providers release and retire models regularly. Keep your test prompts so you can rerun the comparison in minutes.
Related tasks
All tasks