Peking University
4 published articles
K12-Bench: New Test of AI Curriculum Understanding
Why your AI tutor can't see how math builds on itself
Peking University's K12-Bench reveals that even the best language models barely understand how school concepts connect. Scores of 57% and 46% show a blind spot in AI's ability to handle prerequisite chains, concept taxonomies, and visual grounding, skills that real tutors use every day.
2026-08-02
LLM distillation
LLM distillation stalls when context goes static. Flux-OPD makes it evolve
Contexts can carry task preferences into LLM training, but once distilled into a student they add little supervision. Peking University's Flux-OPD keeps the context moving with the student and uses a conflict term to weight teacher corrections. The abstract reports gains over existing OPD paradigms without naming numbers.
2026-07-31
Research Digest
The simple topology trick that beats prompt magic in LLM induction tasks
A new methodology called Hourglass reasoning enforces strict context isolation between induction, deduction, and implementation stages, passing only a compressed symbolic rule between them. On ARC-AGI-2, it raises best-of-5 accuracy by up to 14 points over iterative refinement; on ChipBench Verilog synthesis, it nearly doubles accuracy with GPT-5.5. Ablations confirm the topology itself drives the improvement.
2026-07-31
Hardware & Electronics
A 40nm chip just made Nvidia's A100 look 478 times slower
A joint team from Peking University and the Chinese Academy of Sciences has built a neuromorphic chip that processes neural dynamics 50 to 478 times faster than an NVIDIA A100 GPU while using a fraction of the power. The 40nm phase-change memristor chip achieves millisecond-level real-time neural dynamics, opening the door to surgical navigation and brain digital twins.
2026-07-16