Rightsize Your AI.
fjuja is a simple tool for comparing AI language models side by side. Send one prompt to many models at once — from tiny local models that run entirely in your browser to frontier cloud models via OpenRouter — and see the answers, speed, and cost laid out together so you can pick the right model for the job.
Run the same prompt across a dozen models and read the responses side by side. Benchmarks give you scores. This shows you the actual writing.
Run models locally, right in your browser. Free, private, nothing leaves your machine. When a task needs more muscle, use the full OpenRouter catalog with our integrated API.
Every run logs speed, tokens, and estimated cost next to the response. When a model a tenth the price does the job just as well, you'll see it in the numbers.