According to OpenAI on X (Twitter), the company is acquiring Promptfoo to strengthen agentic security testing and evaluation capabilities within OpenAI Frontier, while keeping Promptfoo open source under its current license and continuing to support existing customers. As reported by OpenAI, integrating Promptfoo’s prompt testing and regression evaluation toolkit will enhance red‑teaming, jailbreak resistance, and automated safety benchmarks for agentic workflows, improving reliability and compliance for enterprise LLM deployments. According to OpenAI, the move signals deeper investment in systematic evaluation pipelines and CI style guardrails for model updates, creating clearer procurement pathways for regulated industries that require auditable prompt evaluations and safety metrics.