OpenAI: GPT-5.3 Chat

GPT-5.3 Chat demonstrates strong overall performance, particularly excelling in reliability with a perfect 100% success rate across all benchmarks, indicating exceptional stability and consistent response delivery. In terms of speed, it generally performs in the top tier, ranking in the 67th percentile. However, its pricing tends to be at a premium level, positioned in the 13th percentile for cost-effectiveness. The model exhibits remarkable accuracy in several critical areas. It achieved perfect scores in General Knowledge and Ethics, with the added distinction of being the most accurate model at its price point and among models of comparable speed in these categories. Its performance in Coding (97% accuracy) and Reasoning (98% accuracy) is also highly competitive, placing it in the 98th and 90th percentiles respectively. Instruction Following is another significant strength, with 89% accuracy, ranking in the 95th percentile. While its Hallucinations accuracy (98%) is solid, it's slightly lower than its top-tier performance in other areas. Mathematics (93%) and Email Classification (98%) show competent performance, though not as standout as its top categories. The primary weakness appears to be its premium pricing structure, which may be a consideration for cost-sensitive applications.