OpenAI: GPT-5.1

OpenAI's GPT-5.1, released November 13, 2025, demonstrates a strong overall performance profile, particularly excelling in reliability and accuracy across several critical benchmarks. The model consistently provides evaluable responses, achieving a perfect 100% success rate across all 8 benchmarks, indicating exceptional reliability with minimal technical failures. In terms of speed, GPT-5.1 performs in the top tier, ranking in the 61st percentile, suggesting efficient processing for many tasks. However, its pricing tends to be at premium levels, positioned in the 18th percentile for cost-effectiveness. GPT-5.1 exhibits perfect accuracy in critical areas such as Hallucinations (100%), General Knowledge (100%), and Ethics (100%), often achieving this at competitive price points and speeds within its accuracy tier. It shows significant strength in Instruction Following (91st percentile accuracy) and Reasoning (83rd percentile accuracy), aligning with its description of improved instruction adherence and general-purpose reasoning. Coding performance is also robust at 94% accuracy (87th percentile). While its Mathematics accuracy is solid at 92%, it ranks in the 63rd percentile, indicating room for improvement compared to its top-tier performance in other areas. The model's ability to provide clearer, more grounded explanations and its refined conversational alignment are key qualitative strengths.