One rollout per prompt: a reader's explanation of an AI training paper

Finding a paper's terminology confusing, one reader offers a breakdown: generate one rollout—a model response—per prompt, batch rollouts from 128 prompts, and use each batch for one optimization update. They contrast this with GRPO's 32 prompts × 4 rollouts. In their explanation, removing groups allows rollouts to be batched as they finish. Their example uses 500 runners feeding a queue, with each batch taking the next 128 completed rollouts regardless of order.