OpenAI: GPT-6 Sol Pro (batch)

OpenAI's GPT-6 Sol Pro (batch), released on September 22, 2026, is a specialized version of GPT-6 Sol with an enhanced `reasoning.mode` for complex tasks. This model demonstrates competitive response times, performing among the faster models with a 55th percentile speed ranking across seven benchmarks. However, it tends to be positioned at premium pricing levels, ranking in the 15th percentile for cost. A standout feature is its exceptional reliability, achieving a 100% success rate across all benchmarks, indicating minimal technical failures. The model exhibits remarkable accuracy in several critical areas. It achieved perfect scores in Hallucinations (100% accuracy), demonstrating a strong ability to acknowledge uncertainty, and in Reasoning (100% accuracy), showcasing advanced problem-solving capabilities. It also excelled in Ethics (100% accuracy), indicating robust moral and ethical understanding. Strong performance was also observed in Instruction Following (91% accuracy, 95th percentile) and Mathematics (95% accuracy, 82nd percentile), suggesting proficiency in complex directives and quantitative tasks. While its Coding accuracy was high at 94% (80th percentile), its Email Classification accuracy was 97% but ranked lower at the 33rd percentile, indicating a potentially less competitive edge in this specific domain compared to other models. Overall, GPT-6 Sol Pro (batch) is a highly reliable and accurate model, particularly for tasks requiring sophisticated reasoning and ethical considerations, albeit at a premium price point.