This report synthesises findings from 3 peer-reviewed papers addressing the following research question: How does Kimi k1.5's reinforcement learning approach compare to next-token prediction pretraining in terms of performance on MMLU or BIG-Bench Hard reasoning benchmarks. 10 claims were extracted from source literature; 9 were independently verified against retrieved documents. An automated multi-reviewer quality assessment produced a score of 7.8/10. This report is a machine-generated literature synthesis and does not constitute original research.Research goal: How does Kimi k1.5's reinforcement learning approach compare to next-token prediction pretraining in terms of performance on MMLU or BIG-Bench Hard reasoning benchmarks?Autonomous literature synthesis. Automated review score: 7.8/10. Full text and citation available at Assignee Research.