Perplexity 与 NVIDIA AI 提出后训练方法 JOLT，让同一模型同时充当教师和学生，并训练教师从自身尝试的奖励中学习、惩罚偏离学生行为的漂移。在 MATH 基准上，JOLT 用少 6.5 倍的训练 token 达到与 GRPO 相当的准确率。JOLT+ 在此基础上为学生模型增加结果奖励，在数学、编程、终端任务和工具使用基准上明显优于 GRPO。
Sharing new post-training research on self-distillation + RL (JOLT), done together with @NVIDIAAI.
In self-distillation, the same model performs the role of both a teacher and a student. The teacher gets extra information that the student doesn't, and the student learns from feedback provided by the teacher. However, the teacher could still use shortcuts in ways the student has no way to follow.
Our proposed approach, JOLT, trains the teacher as well, to learn from rewards on its own attempts, while penalizing any drift that's far off from what the student model would do. JOLT+ further supplements JOLT by providing the student model outcome-based rewards in addition to the teacher supervision signals.
On the MATH benchmark, we found that JOLT matches GRPO with 6.5x fewer training tokens, while JOLT+ convincingly beats GRPO across math, coding, terminal tasks, and tool use benchmarks.
New research: We developed JOLT, a post-training method where one model acts as both teacher and student, with the teacher trained to give feedback the student can use. On MATH, it matched GRPO's accuracy with 6.5x fewer training tokens. https://www.perplexity.ai/hub/blog/a-good-teacher-meets-the-student-where-they-are在 X 查看被引用的帖子
来源：Aravind Srinivas · x.com