The problem
Imagine one model succeeds on 85% of your examples and another reaches 86% at twice the cost. Those are the hypothetical numbers that sparked this product question.
A newer model sounds like an obvious upgrade until someone asks what the extra money actually buys. A general benchmark cannot tell you which of your cases changed.
How Nibuno would handle it
The planned comparison holds the prompt and examples fixed, runs both models, and puts their answers, failures, response times, and costs side by side. You can inspect the additional successes and the cases that regress.
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Product preview — Nibuno is currently in development. Examples use illustrative data.
What you’d compare
Calculate cost per acceptable result, then review the significance of each changed case. One additional critical success may matter more than several cosmetic improvements. The 85% / 86% example is a decision scenario, not a measured Nibuno result.