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Small utilities we built for our own work and left open for everyone.
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AI cost calculator
Enter your monthly usage and compare what Claude, GPT-4, Gemini and others would actually cost.
Open 60 secondsWhich AI fits you?
Five questions, then three tools we would actually recommend for your situation.
OpenOur Japanese edition also has a library of nearly 300 curated prompts. It has not been translated yet — you can browse it in Japanese.