Prefactor

About Prefactor

Most agents pass their evals and fail in production. Prefactor is the evaluation layer that closes the gap. We score every agent run in real time, surface quality regressions and drift as they happen, and show engineering teams exactly how their agents are performing at scale. Built for the teams shipping agents to customers.

Evaluate your AI Agents in real-time

Similar tools

ChatGPTReason, write, and prototype with OpenAI's frontier models.ClaudeLong-context reasoning and coding with Anthropic's models.GeminiMultimodal reasoning across text, image, and video.PerplexityAnswer questions with live, cited web search.GrokxAI's assistant, wired into real-time posts on X.MistralEuropean frontier and open-weight models, via chat or API.