Grok Cloud Pricing Leaks: 10-Second Video Costs Just $1.41

xAI's Grok Imagine 1.5 lands as an image-to-video model with a deliberate trade-off: tighter fidelity to your source frame, new audio prompting, and a hard requirement that you bring a still image to start. Here's what actually changed from the original, and the one constraint that reshapes how you