Free AI Tools
Free, open source, own-key tools for working with language models. Run them with your own API keys. Nothing is sent to our servers. Each tool does one job genuinely well.
Model Compare
FlagshipCompare two AI models side by side on your own question, using your own keys.
See how the information you give an AI changes its answer. Ask with your document, or without.
Run the same prompt at one model several times and see how much the answer moves.
Cost Table
NewSee what your workload costs on every model, cheapest first. No API key needed.
See how often a model returns the JSON your code depends on, measured over several runs.
Ask one model the same thing two ways and see what each phrasing costs.
Ask one model the same question under two sets of standing instructions and see what each costs.
Find the cheapest model that is still good enough for your task. You decide what passes.
You know the right answer. A quick check tells you whether the AI got it. A first look, not proof.
Paste your source and see whether the AI answer stuck to it. A read to help your review.
Check your own draft against your rules, point by point. A read to help your review.
All tools are provided as-is, without warranty, and you use them at your own risk. You are free to copy the code and change it however you like. The tools run on your own API keys, so you are responsible for your own usage and costs. We are independent: no model provider pays us or incentivizes us to favor their models. For more advanced AI evaluation, see our paid features.