OpenAI: GPT-5.1-Codex

OpenAI's GPT-5.1-Codex demonstrates competitive response times, ranking in the 54th percentile across benchmarks, and offers moderate pricing, placing it in the 23rd percentile. Notably, it exhibits exceptional reliability with a 100% success rate, indicating minimal technical failures. The model excels in several areas, achieving perfect accuracy in Hallucinations (Baseline), General Knowledge (Baseline), and Ethics (Baseline) tests, often at a competitive price point and speed within those categories. Its specialized coding capabilities are evident with a strong 95.0% accuracy in the Coding (Baseline) benchmark, placing it in the 91st percentile. Instruction Following (Baseline) is also a significant strength, with 85.9% accuracy (94th percentile). While strong in Reasoning (92.0% accuracy) and Mathematics (93.0% accuracy), its Email Classification (98.0% accuracy) performance, though high, is closer to the average for its category (58th percentile). Overall, GPT-5.1-Codex is a highly reliable and accurate model, particularly strong in coding, general knowledge, and ethical reasoning, making it well-suited for its intended agentic coding applications.