ResearchBenchmarksStory Generation Quality on 180 held-out prompts (ID 1–4k)Story Generation Quality on 180 held-out prompts (ID 1–4k)Follow57.4Story Quality ScorePOLARIS54.5355.96557.458.835Jun 2, 2026Evaluation resultsMethodMethodLinksStory Quality ScorePOLARISP=9BP=9B2026.0657.4