Free tools

AI tools that actually decide things

Instant, no-signup utilities for people building with AI — the numbers behind the buying decision, not another listicle.

Calculator
AI API Cost Calculator
Estimate your monthly API spend across GPT-4o, Claude, and Gemini from your own usage — ranked cheapest-first.
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Checker
Local-LLM GPU Checker
Pick your GPU (or enter VRAM) and see exactly which open LLMs you can run locally — and at which quantization.
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Picker
Which AI Model Should I Use?
Answer a few questions about your use case and budget, get a top pick plus two alternatives with the reasoning.
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Table
AI Model Comparison
Context windows, prices, modality, and open-weights status for every major model — filterable, side by side.
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