Tag
VAPO
Posts and notes tagged with VAPO.
- August 27, 202613 min read
Value-Model-Based Augmented PPO (VAPO)
How VAPO makes PPO with a value model work for long chain-of-thought reasoning: pretraining the value model, decoupling and adapting GAE to response length, and borrowing DAPO's fixes for sparse rewards, to beat value-free methods like GRPO and DAPO.