POLARIS trains Qwen3.5-9B via GRPO with LLM-as-judge rewards and human-reference injection, yielding a model competitive with larger open-weight models on length adherence and quality, including generalization to 3x training length.
L it B ench: A Benchmark and Dataset for Reliable Evaluation of Creative Writing
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POLARIS: Guiding Small Models to Write Long Stories
POLARIS trains Qwen3.5-9B via GRPO with LLM-as-judge rewards and human-reference injection, yielding a model competitive with larger open-weight models on length adherence and quality, including generalization to 3x training length.