IZONUS Proof compares two AI skills head-to-head across Claude, GPT-4o, and Gemini. See real output quality, actual token costs, and security risks — before you commit.
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avg token reduction
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3
AI models compared
100%
browser-private keys
Paste SKILL.md content directly or drop a GitHub URL. We fetch it automatically.
Choose Claude, GPT-4o, Gemini, or run all three at once for a full comparison.
IZONUS Proof generates a subject-specific stress test and runs both skills against it.
Get a full scorecard: output quality, cost, safety, token usage, and a clear winner.
No more guessing which prompt or skill is more efficient
Paste two skills and compare them head-to-head across Claude, GPT-4o, and Gemini simultaneously. See real output quality, token costs, and speed.
See exactly what each skill costs per run across every major AI provider. Find the cheapest model that still delivers quality.
Traffic-light security scan detects prompt injection, credential theft, destructive commands, and hidden instructions before you install anything.
Paste a bloated skill and get back a leaner version that does the same job for 30% fewer tokens. Compound savings at scale.
Track every dollar and token you've saved. See which skills are worth keeping, which need refinement, and which are costing you money.
Use your own Anthropic, OpenAI, or Google API key. Your key stays in your browser — we never store it. Pro users get unlimited duels.