OpenAI's Sora was the headline AI video tool of the last 18 months. ZSky AI offers free unlimited AI video generation. Both can generate short clips from text prompts. They make very different trade-offs. I've spent enough time with both to write this honestly. There are things Sora does that ZSky doesn't, and vice versa. Anyone telling you "free is just as good" or "paid is worth it" without context is selling something. Here's the real picture. At a Glance ZSky AI Sora (Plus/Pro) Cost Free, unlimited $20–$200/mo Generation cap None 50–500/mo depending on tier Max clip length ~5–10s typical 5–20s depending on tier Resolution 720p–1080p 480p–1080p Audio No No Latency ~30–60s typical ~1–4 minutes Image-to-video Yes Yes Text-to-video Yes Yes Style control Prompt-based Prompt + remix What Sora Does Better Let me start with what's true. Sora has spent enormous resources on this and it shows. Subject coherence in long shots.…