#GRPO

$500 RL Fine-Tuning Surpasses Frontier AI: The Dawn of Hyper-Personalized AI for Vibe Coding

A case has emerged where a 9B open model, fine-tuned with reinforcement learning for just $500, surpassed frontier models like GPT-5.6 on specific tasks. This shows that AI assistants tailored to individual developers' styles and domains are becoming a reality in the vibe coding era.