alt Hacker News2/5 isn't quality, it's consistency as written there. The full links are at the bottom. Most of Spark's attempts are failures:
https://d1md4c6gq9re9p.cloudfront.net/blog/gpt-5.6-buildoff/...
https://d1md4c6gq9re9p.cloudfront.net/blog/gpt-5.6-buildoff/...
https://d1md4c6gq9re9p.cloudfront.net/blog/gpt-5.6-buildoff/...
Ah, I missed that, and didn't click through the links. Most of the videos are not showing any animation for me, only Opus / Qwen / Muse, so Grok's attempt looked broken.