OpenAI: GPT-5.4 Nano

OpenAI's GPT-5.4 Nano, released on March 17, 2026, is a highly optimized, lightweight model designed for speed-critical and high-volume tasks. It consistently ranks among the fastest models, achieving the 94th percentile across 8 benchmarks, and offers competitive pricing, typically falling within the 68th percentile. A standout feature is its exceptional reliability, demonstrating a 100% success rate across all benchmarks, indicating minimal technical failures. In terms of performance across categories, GPT-5.4 Nano excels in areas requiring rapid, reliable outputs. It shows strong performance in Hallucinations (96.0% accuracy) and Email Classification (96.0% accuracy), aligning with its design for classification and data extraction. Its Mathematics performance is notable, achieving 74.0% accuracy and ranking in the top 3 for speed. However, its accuracy in Reasoning (44.0%) and Coding (79.0%) is comparatively lower, suggesting it prioritizes responsiveness and efficiency over deep, complex problem-solving. General Knowledge (95.0%) and Ethics (97.0%) also show solid accuracy but with lower percentile rankings, indicating a focus on breadth rather than specialized depth.