Recursive Synthesis for Long-Horizon Terminal Tasks
- Published
- Source
- arXiv
- Paper number
- 835
- Field
- AI / General
- arXiv ID
- 2608.05466
Key points
- Recursive synthesis makes tasks progressively harder while preserving consistency across instructions, environments, answers, and verifiers.
- After 15 rounds, it generates 37,484 tasks, and the synthesis yield does not fall, which means there is no apparent ceiling.
- The intermediate answer length grows from 67 lines to 374 lines, which is a 5.6 times increase, and the number of instructions increases by more than 6 times.
- When the synthetic data is used for SFT and PPO training, performance improves by up to 10 points on Terminal-Bench 2, Hard, and Long-Horizon tasks.
- DeepSeek-V4-Pro pass@4 falls from 90 percent to 2.5 percent, which shows that the tasks become substantially harder.
Paper links
External research summaries. These are not HDATF publications or measured product results.