STEM & Reasoning Benchmark

BrokenArXiv

Math reasoning benchmark reported in the Tencent Hy4 preview model card appendix.

Category

STEM & Reasoning

Score type

percent

Scale

100%

higher is better

Models tested

4

What is BrokenArXiv?

BrokenArXiv is a benchmark for hard reasoning in science, technology, engineering and math. The official description says: "Math reasoning benchmark reported in the Tencent Hy4 preview model card appendix". Below we describe in simple words what benchmarks of this type generally examine.

What does it test?

BrokenArXiv measures hard reasoning in science, technology, engineering and math. In detail, it checks:

  • graduate- and expert-level questions in science and math
  • multi-step derivations where each step must be correct
  • problems written to defeat memorisation (novel or recent exam problems)
  • correct use of formulas, units and logical inference

How to read the score

The score is accuracy: the percentage of tasks answered or solved correctly. 100% means every task was solved perfectly; higher is better.

Official methodology note: Math reasoning benchmark reported in the Tencent Hy4 preview model card appendix.

Frequently asked questions

What is the BrokenArXiv benchmark?

BrokenArXiv is a benchmark for hard reasoning in science, technology, engineering and math. The official description says: 'Math reasoning benchmark reported in the Tencent Hy4 preview model card appendix'. Below we describe in simple words what benchmarks of this type generally examine.

What does BrokenArXiv test?

BrokenArXiv mainly measures hard reasoning in science, technology, engineering and math. Concretely, it checks: graduate- and expert-level questions in science and math; multi-step derivations where each step must be correct; problems written to defeat memorisation (novel or recent exam problems).

How is the BrokenArXiv score calculated?

The score is accuracy: the percentage of tasks answered or solved correctly. 100% means every task was solved perfectly; higher is better. The declared maximum score of this benchmark is 100.0.

Where do I get BrokenArXiv data and scores?

The official benchmark page/reference is linked on this page. Every score on Open LLM Radar is also available as open data: download the scores JSON (http://open-llm-radar-api:8000/api/v1/benchmarks/brokenarxiv/scores) or pull it directly from the Open LLM Radar API with any HTTP client.

Model scores 4 models tested

Reset
# Model Score Date Source Verified
1 Kimi K3
Moonshot AI
56.3%
28.08.2026 Tencent Hy4 preview model card benchmark appendix (https://huggingface.co/tencent/Hy4-preview#benchmark-appendix) (Tencent rerun) Verified
2 Hy4 preview
Tencent
54.6%
28.08.2026 Tencent Hy4 preview model card benchmark appendix (https://huggingface.co/tencent/Hy4-preview#benchmark-appendix) Verified
3 Qwen3.8-2.4T-A95B
Qwen
42.7%
28.08.2026 Tencent Hy4 preview model card benchmark appendix (https://huggingface.co/tencent/Hy4-preview#benchmark-appendix) (Tencent rerun) Verified
4 Hy3
Tencent
26.7%
28.08.2026 Tencent Hy4 preview model card benchmark appendix (https://huggingface.co/tencent/Hy4-preview#benchmark-appendix) Verified

What now?

You've seen how models score on BrokenArXiv — here's what to do next.