Generate 100 subject lines with ChatGPT, filter them down to 5 with a 4-criterion rubric, then A/B/n test the finalists. The exact prompt, the 5 that made it through, and the test result — including the variant I would never have written on my own that beat my favorite by 19%.
A 3-step workflow to generate a pack of meta title variants with ChatGPT, score them against CTR predictors, and ship the winner through a clean AB test.
A battle-tested 6-stage pipeline that turns one brief into 200 ad creatives in 9 days — the angle matrix math, the production sprint, the pre-launch ranking, and the kill/scale rules that surface 14 winners by day 9.
YouTube's official Test & Compare feature runs 7 days. Here's the 48-hour fast-iteration loop I use with creator clients — including when to trust the data, when not to, and the AI tools that actually shorten the cycle.
A 15-year marketer's step-by-step workflow for shipping a full landing page plus AB test variants in an afternoon — using Claude Artifacts and the same vibe-coding technique Karpathy described for engineers.
The 30-second Gemini prompt that tells you the right sample size before you launch any AB test, plus the formula behind it and the failure modes it prevents.
