Anthropic: Claude Opus 5.5 (batch)

Anthropic's Claude Opus 5.5, created September 22, 2026, is positioned as a flagship model for demanding reasoning, coding, and agentic work. It demonstrates competitive response times, ranking in the 50th percentile for speed across benchmarks. However, it is positioned at a premium price point, falling into the 10th percentile for cost. A significant strength is its exceptional reliability, achieving a 100% success rate across all evaluated benchmarks, indicating consistent operational stability. Performance across categories highlights several strengths. The model achieved perfect accuracy in General Knowledge, notably being the most accurate and fastest among models at its price point. It also excelled in Coding (96% accuracy, 93rd percentile) and Instruction Following (85% accuracy, 90th percentile), aligning with its description for complex tasks. Reasoning also showed strong performance at 96% accuracy. While its Hallucinations score of 98% accuracy is good, it's not top-tier (61st percentile). Ethics (99% accuracy, 42nd percentile) and Mathematics (92% accuracy, 52nd percentile) show solid, but not leading, performance. Its primary weakness is its premium pricing, which may limit accessibility for some use cases despite its strong capabilities.