OpenAI: GPT-5.4 Nano

GPT-5.4 Nano, released on March 17, 2026, is a highly optimized and cost-efficient 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 69th percentile. Notably, it demonstrates exceptional reliability with a 100% success rate across all benchmarks, indicating minimal technical failures. The model excels in tasks requiring rapid, reliable outputs. Its strengths are evident in its high accuracy for Hallucinations (96.0%) and Email Classification (96.0%), showcasing its ability to acknowledge uncertainty and categorize information effectively. While its General Knowledge (95.0%) and Ethics (97.0%) scores are respectable, they fall within the 30-36th percentile, suggesting a focus on efficiency over deep, nuanced understanding in these areas. Performance in Instruction Following (61.0%), Reasoning (44.0%), and Coding (39.5%) indicates these are areas where the model prioritizes speed and cost over complex problem-solving. Its Mathematics score (74.0%) is solid, and it notably achieved a top 3 ranking in speed for this category. Overall, GPT-5.4 Nano is ideal for low-latency applications, background tasks, and distributed agent architectures where speed, cost-efficiency, and reliability are paramount.