I've tried lots of AI image generators, and Nvidia and MIT's is the one to beat for speed
Briefly

The Hybrid Autoregressive Transformer (HART), developed by MIT, Nvidia, and Tsinghua University, revolutionizes AI text-to-image generation with unprecedented speed, offering image creation times of 1.8 seconds. Unlike traditional diffusion models, HART utilizes an autoregressive approach, enabling step-by-step image generation and improved control over the output. This advancement results in latency reductions of 3.1 to 5.9 times compared to current models. A hybrid tokenizer was also introduced to process images more efficiently, addressing resolution quality issues and setting a new benchmark in speed and throughput for AI-generated visuals.
The Hybrid Autoregressive Transformer (HART) by MIT, Nvidia, and Tsinghua University sets a new standard in AI image generation with remarkable speed and efficiency.
HART's innovative autoregressive model generates images step-by-step, allowing for greater control and speed, achieving generation times of just 1.8 seconds.
Read at ZDNET
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