OpenAI: GPT-5.1 Chat

OpenAI's GPT-5.1 Chat, created on November 13, 2025, is a fast, lightweight model optimized for low-latency chat with strong general intelligence. It performs among the fastest models, ranking in the top tier for speed (67th percentile across 8 benchmarks). The model offers moderate pricing, placing in the 26th percentile. Notably, GPT-5.1 Chat demonstrates exceptional reliability with a 100% success rate across all benchmarks, indicating minimal technical failures. The model exhibits perfect accuracy in Hallucinations, General Knowledge, and Ethics benchmarks, often being the most accurate at its price point and speed. Its adaptive reasoning contributes to strong performance in Mathematics (93.0% accuracy, 71st percentile), Reasoning (93.9% accuracy, 78th percentile), and Coding (94.0% accuracy, 88th percentile). A key strength is its Instruction Following, achieving 83.0% accuracy (90th percentile), reflecting its design for better instruction adherence. Email Classification is solid at 98.0% accuracy (58th percentile). Overall, GPT-5.1 Chat excels in accuracy across a broad range of tasks, particularly in knowledge, ethical reasoning, and complex problem-solving, while maintaining high speed and reliability.