Braintrust

What is Braintrust?

Braintrust is a tool for LLMOps and inference observability, focused on AI evaluation, prompt experiments, and production monitoring. It is aimed at developers, AI engineers, and platform teams, and it works best when you need request logging, cost monitoring, evaluation workflows, and production monitoring in a workflow that needs to stay repeatable, reviewable, or easy to hand off. The source data lists it as free trial. It is offered through API or cloud access, with developer integration support. That makes it easier to evaluate on a budget without assuming a fixed package or exact commercial terms that may change later. In day-to-day use, it is most relevant for evaluation runs, prompt experiments, production monitoring, and dataset comparisons and for teams that want a structured starting point before they commit to a deeper platform choice. The main caution is that performance and spend depend on your traffic patterns and model mix; you still need clear ownership for logs, metrics, and review loops. For production, security, or customer-facing work, a human review step and a small pilot still matter.