Anthropic: Claude Opus 4.1

Anthropic's Claude Opus 4.1, released August 5, 2025, is an advanced model excelling in coding, reasoning, and agentic tasks, with a substantial 200,000 context length. It demonstrates moderate speed performance, ranking in the 34th percentile across benchmarks, and is positioned at premium pricing levels, in the 3rd percentile. A standout feature is its exceptional reliability, achieving a 100% success rate with minimal technical failures. The model exhibits perfect accuracy in Hallucinations (100%) and General Knowledge (100%), often being the most accurate at its price point and speed. It also achieves perfect accuracy in Ethics (100%). Strong performance is noted in Coding (94.0% accuracy, 92nd percentile) and Reasoning (92.0% accuracy, 82nd percentile), aligning with its description of improved capabilities in these areas. Mathematics (92.9% accuracy, 76th percentile) and Instruction Following (69.0% accuracy, 80th percentile) also show solid results. Email Classification, while accurate at 98.0%, ranks in the 54th percentile, indicating average performance relative to its peers in this specific task. Its key strengths lie in its accuracy across critical domains and its robust reliability, making it suitable for demanding applications requiring precision and consistency.