Best AI for ad copy
A good ad makes one promise, fast, within Meta's or Google's character limits and policy lines. Most AI ad copy stacks three benefits, two superlatives, and an exclamation point — which underperforms and sometimes gets rejected. The right model writes tight, testable variants; the wrong one writes a brochure.
Best at restraint — one benefit, plain words, headline that fits the limit, a CTA that isn't shouting. Ad copy is a cutting exercise and Sonnet 4.6 cuts.
GPT-5.4 is better at volume — ask for 20 headline angles to A/B test and it'll genuinely vary the hook (problem, outcome, social proof, curiosity, urgency) rather than reword one idea.
Write Meta ad copy for a project-management app aimed at small agency owners. Pain point: projects slipping because updates live in 5 places. Give me 8 primary-text variants (each under 125 characters before the fold), 5 headline options (under 40 chars), and one CTA. Vary the angle — don't just reword the same hook. No exclamation points, no "revolutionary."
What to look for in any model
- 1Give it the platform and the limits — a Google RSA headline (30 chars) and a Meta primary text (125 chars before "see more") need different copy
- 2Specify the awareness stage — cold-audience ad copy and retargeting copy are not the same job
- 3Ask for distinct angles, not variations — 20 rewordings of one hook is one test, not twenty
- 4Run it past the platform's policy in your head — superlatives, "you" claims about health/finance, and before/after framing get ads disapproved
Run it yourself — free, no card
See the actual output, the actual cost, the actual latency. StudyAIMastery is free to start.