compare-gpt-model-tiers (Comparing GPT Model Tiers)

You can run this example with:

bash

npx promptfoo@latest init --example compare-gpt-model-tiers
cd compare-gpt-model-tiers

Usage

Set your OPENAI_API_KEY environment variable, then run npx promptfoo@latest eval.

This example compares gpt-5.4, gpt-5.4-mini, and gpt-5.4-nano on the same prompts so you can compare quality, latency, and cost across model tiers.

Note: this example uses a latency assertion, so use --no-cache to get accurate timing results.