Image source: Getty ImagesThe FTSE 100 (^FTSE) and FTSE 250 (^FTMC) aren’t exactly brimming with obvious AI-related stocks. Something differentIn contrast, I think Baillie Gifford US Growth Trust (USA.L) does offer something different. Baillie Gifford US Growth Trust sees a lot of opportunity here, and it hopes to get in near the ground-floor level with some of these start-ups. Baillie Gifford US Growth TrustOne potentially very disruptive private company is Runway AI, which uses generative AI to make and edit videos, images, and special effects. Baillie Gifford says a major retailer has used it to visualise 3D models of furniture listed on its website.