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Public story · 2026-08-10 · high
Stack a difficulty curriculum on top of that selection and the gain reaches 143.2%.
Why now: The paper's direct test of the scale-more-environments assumption is dated August 10, right as agent-training setups default to adding more of them.
Researchers selected 30 training environments from a pool of 200 and beat the full set's relative training gain, per a Chinese Academy of Sciences paper. For teams training agents, that's a case against defaulting to more environments. The ability-aware selection method delivered a 95.6% relative gain, versus 43.4% for training on all 200.
Stack a Hierarchical Difficulty Curriculum on top of that selection, sequencing tasks by difficulty instead of feeding them in randomly. The average relative improvement reaches 143.2%, per the paper.
Not every environment type transfers the same way. Multimodal environments showed far stronger negative transfer than text-symbolic ones: a 10.7% drop against a 1.3% drop. A mismatched environment can actively hurt performance, not just fail to help.
The selection method also depends on something the paper calls conflict control. Strip it out and out-of-distribution gains collapsed from 40.3% to 2.8%. The description doesn't spell out what conflict control does mechanically, only that removing it erases most of the effect.
Each link below shares sources, entities, or timing with this story.
Shared entity: Multimodal / Same source domain / Earlier coverage
Both cover Multimodal; reported by the same outlet (huggingface.co); earlier Multimodal coverage from 2026-04-02.
Same source domain / Shared topic / Tension
Reported by the same outlet (huggingface.co); overlapping topics (average, gain); pushes against this story (versus).
Same source domain / Shared topic
Reported by the same outlet (huggingface.co); overlapping topics (agent, average, gain).
Reported by the same outlet (huggingface.co); overlapping topics (agent, average, environment).
Shared entity: Multimodal / Earlier coverage / Tension
Both cover Multimodal; earlier Multimodal coverage from 2026-07-31; pushes against this story (against).
Same source domain / Shared topic
Reported by the same outlet (huggingface.co); overlapping topics (agent, beat, gain).
Shared topic / Tension
Overlapping topics (agent, average, beat); pushes against this story (against).
Overlapping topics (agent, beat, control); pushes against this story (vs).