We have been testing GPT 5.6 for about a week as a preview model through a YC relationship, providing them feedback on the model. Our evals run in github CI and we can run them all in about 15 minutes against our eval bench of 115+ web design and marketing related jobs that ploy.ai specializes in.
then after we toggled it on (through a posthog feature flag) we actively monitored for failures.
I came from running Webflow, which powers > 1% of the internet so trying my best to relay all of that knowledge to ploy to power more % of the internet!
The best prompt isn't a prompt. It's a picture. That and many other I've picked up building websites with AI: how to spot slop, where the models forget, why the design plan is the whole game.