Promptperf

Promptperf is a benchmarking and evaluation platform designed to help you systematically compare over 100 AI models, including GPT-5, Claude 4.5, and Gemini 3. Its primary purpose is to show which model performs best for your specific prompts and tasks, so you can make data-driven decisions instead of relying on guesswork or marketing claims. By standardizing how prompts are tested and scored, Promptperf enables consistent, repeatable evaluation across providers and model versions.

The platform lets you run the same prompt set across many models in parallel, then review responses side-by-side with structured metrics. You can define custom evaluation criteria, integrate automatic scoring (e.g., using LLM-as-a-judge or rule-based checks), and export results for further analysis. Promptperf supports prompt sets, versioning, and experiment history, making it easier to track how changes to prompts or model choices affect quality over time. It also centralizes access to multiple model APIs, reducing the need to manually manage credentials and separate scripts for each provider.