Instantly test and compare AI prompts results across models
LLMs change fast — GPT-4 updates silently, models vanish, and prompts break. PromptPerf helps you stay ahead by testing a prompt across GPT-4o, GPT-4, and GPT-3.5, comparing outputs to your expected result using similarity scoring. ✅ 3 test cases per run, unlimited runs ✅ CSV export ✅ Built-in scoring More models and batch runs coming soon. One feature per 100 users. Built solo. Feedback welcome 🙏 promptperf.dev
PromptPerf allows users to test the same prompt across 100+ AI models including GPT, Claude, and Gemini simultaneously, enabling direct performance comparison to identify the best model for their needs without coding.
PromptPerf provides side-by-side comparison results showing how different AI models handle specific tasks, enabling informed vendor selection based on actual performance rather than marketing claims.
Users can test different prompt versions against multiple AI models in parallel to see which phrasing produces the best results across different LLM architectures, improving prompt quality systematically.
By comparing outputs and performance across 100+ models, users can select the most efficient and affordable model that meets their quality requirements, avoiding unnecessary spending on premium models.