AVB drops a 50-minute GRPO + RLVR deep dive — and you watch logits move in real time

Avishek Biswas (@neural_avb) shipped a 50-minute long-form tutorial that walks through GRPO low-level mechanics, trains sub-1B SmolLM and Qwen3 models on text-based RLVR gym envs, and animates PPO updates so you literally see the policy logits shift. Code included.