The SDXL API has been optimized to achieve a 45% increase in speed and a nearly 50% reduction in serving costs. This improvement is due to the introduction of two new parameters, optimize and enhance, which significantly boost processing speed when set to True. Performance tests across various scenarios and step counts showcase considerable performance improvements with speed enhancements ranging from 24.15% to 44.96%. The new API offers a 2x high-speed experience at 50% lower cost without compromising quality. Users can try the optimized SDXL API by following the provided integration instructions.