OJBench (C++)
OJBench (C++) is the C++ subset of OJBench, a competition-level code benchmark that evaluates large language models on programming competition problems from NOI and ICPC using C++ as the implementation language.
Kimi K2.5 from Moonshot AI currently leads the OJBench (C++) leaderboard with a score of 0.574 across 1 evaluated AI models.
What OJBench (C++) measures
OJBench (C++) is a text benchmark that evaluates large language models on reasoning and code tasks. LLM Stats tracks 1 model on this benchmark, with a maximum possible score of 1. Current average across reported models is 0.6, with the leader reaching 0.6.
Compare leaders on the best AI for reasoning and best AI for code leaderboards.
Publication
- Paper
- OJBench: A Competition Level Code Benchmark For Large Language Models
- Authors
- Zhexu Wang, Yiping Liu, Yejie Wang, Wenyang He, and 8 others
- Published
- arXiv
- 2506.16395
Abstract
Recent advancements in large language models (LLMs) have demonstrated significant progress in math and code reasoning capabilities. However, existing code benchmark are limited in their ability to evaluate the full spectrum of these capabilities, particularly at the competitive level. To bridge this gap, we introduce OJBench, a novel and challenging benchmark designed to assess the competitive-level code reasoning abilities of LLMs. OJBench comprises 232 programming competition problems from NOI and ICPC, providing a more rigorous test of models' reasoning skills. We conducted a comprehensive evaluation using OJBench on 37 models, including both closed-source and open-source models, reasoning-oriented and non-reasoning-oriented models. Our results indicate that even state-of-the-art reasoning-oriented models, such as o4-mini and Gemini-2.5-pro-exp, struggle with highly challenging competition-level problems. This highlights the significant challenges that models face in competitive-level code reasoning.
Kimi K2.5 leads with 57.4%.
Progress Over Time
Interactive timeline showing model performance evolution on OJBench (C++)
OJBench (C++) Leaderboard
| Context | Cost | License | ||||
|---|---|---|---|---|---|---|
| 1 | Moonshot AI | 1.0T | — | — |
FAQ
Common questions about OJBench (C++).
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