Research & academia
Empty shelves or lost keys? Recall is the bottleneck for parametric factuality
Frontier LLMs can encode 95–98% of tested facts yet fail to directly recall 26–34%; the study argues factuality is increasingly limited by access, not storage.
Why it matters: If a model stores a fact but cannot reliably retrieve it, scaling alone may not address the main bottleneck. The findings point toward improving knowledge utilization, while noting that thinking has a computational cost and when to invoke it remains unclear.