ResearchResearch paperLarge Language Models1 source · Oct 21, 2026

LongZero: Enhancing Long-Context Reasoning in LLMs from Zero Data

Therefore, we propose $LongZero$, a method that lets an LLM improve its own long-context reasoning without any external data.

Key points

  • Reinforcement learning (RL) is an effective way to strengthen the long-context reasoning of large language models (LLMs), but it needs training data that are long, diverse, challenging, and verifiable.
  • LongZero combines these self-written multi-hop reasoning tasks with self-written multi-round retrieval tasks and trains the model with GRPO.
  • We evaluate LongZero on two LLMs across five long-context reasoning benchmarks and compare it with RL on data synthesized from external corpora.
  • Experimental results show that LongZero can generalize to real tasks, and outperforms both baselines, suggesting a viable and promising path to improving long-context reasoning of LLMs.

Sources (1)

  • [1]LongZero: Enhancing Long-Context Reasoning in LLMs from Zero Data
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 21, 05:59 PM
    Therefore, we propose $LongZero$, a method that lets an LLM improve its own long-context reasoning without any external data.
    Reinforcement learning (RL) is an effective way to strengthen the long-context reasoning of large language models (LLMs), but it needs training data that are long, diverse, challenging, and verifiable.

Extractive summary: sentences quoted from the sources.

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