OpenAI: GPT-5.1

GPT-5.1 demonstrates competitive response times, performing among the faster models with a 60th percentile speed ranking across various benchmarks. However, it is positioned at a premium pricing level, ranking in the 17th percentile for cost-effectiveness. A standout feature is its exceptional reliability, achieving a perfect 100% success rate across all evaluated benchmarks, indicating robust and consistent operation. The model exhibits strong performance across a broad range of tasks. It achieves perfect accuracy in Hallucinations, General Knowledge, and Ethics, often being the most accurate model at its price point and speed. Instruction Following and Reasoning also show high accuracy at 83% and 96% respectively, with Reasoning being particularly fast. Coding performance is robust at 94% accuracy. While Mathematics scores 92%, it is notable for its ability to tackle complex problems. Email Classification, at 98% accuracy, is solid but not a top-tier performance compared to other categories. Key strengths include its perfect accuracy in critical areas like hallucination prevention and general knowledge, coupled with strong reasoning and coding capabilities. Its primary weakness lies in its premium pricing, which may limit accessibility for some use cases despite its high performance.