Published on2026년 4월 12일OpenAI RFT with Custom Graders: A Practical Guide for Product and Platform Teamsai-platformopenairftreinforcement-fine-tuningcustom-gradersevalsreasoning-models2026-042026-04-12A practical guide to OpenAI reinforcement fine-tuning with custom graders, including when to use it, how to prepare data, how to evaluate checkpoints, and how to roll it out safely.