GPT-5.4 is the standard foundation model in the 5.4 series, designed for high efficiency and professional reliability. It features a 33% reduction in factual errors compared to GPT-5.2 and introduces native computer-use capabilities for agentic workflows. While slightly less powerful than the Pro version, it remains a top-tier instruction follower (89.5) and highly helpful assistant (89.5). It is particularly optimized for workplace tasks like drafting and data analysis, offering a 47% reduction in token usage for specific tasks, making it a faster and more cost-effective alternative for general professional use.