OpenAI's Decisions API Is Now Live for Everyone — and It Was Built to Catch a Startup
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You need a deck by Friday. Two very different tools promise to help: Gamma, the AI that writes your whole presentation from one prompt, and Canva, the design platform everyone already knows. They are not really the same product — and picking the wrong one wastes an afternoon. Here is the honest breakdown.
Gamma's whole pitch is simple: type a prompt — or paste your notes, a PDF, even a URL — and get a finished-looking deck in about a minute. It uses "cards" instead of traditional slides, looks web-native, and shares by link. There is barely any design work involved. That is the point.
Canva works the opposite way. Its Magic Design drafts a deck from your prompt, then you polish it slide by slide in a real editor: drag, drop, resize, brand it. That control is the appeal — and the cost. A Gamma deck takes 60 seconds. A polished Canva deck takes 30 to 60 minutes. One is a generator; the other is a workshop.
Gamma's free plan is really a demo: 400 one-time AI credits that do not refresh — active users burn through them in a couple of weeks. Paid plans start at Plus ($12/month, or $9/month billed annually), then Pro ($25/month, or $18/month annually). Credits pay for each AI action, roughly 40 credits per full presentation.
Canva's free tier is genuinely usable for occasional decks. Canva Pro recently went up — currently about $18/month or $144/year — but you are paying for the whole platform: templates, stock assets, Brand Kit, video, and the works. Both companies move prices fast, so check the pricing pages before you pay.
Gamma's biggest gotcha: its PowerPoint export is shaky. Layouts shift, fonts get substituted, animations vanish — budget 15 to 30 minutes of cleanup before sending a deck to a corporate client. PDF export is safer, and sharing by web link is the best experience. The generated text can also feel generic, so you still need to edit the words yourself.
Canva's gotcha is the mirror image: the AI does not finish the job for you. Pick a template, customize it, fix the text overflow on slide seven — it is still manual work. Its AI image quality also lags behind dedicated image tools, and heavy AI use is metered per plan.
Pick Gamma if you need a deck fast and do not want to design — students, freelancers turning notes into a polished deck, anyone who shares decks by link. It is also cheaper for pure AI deck-making. (It even spins up simple websites and docs from the same prompt.)
Pick Canva if you need design control and brand consistency — marketers, creators, teams where the deck is one of many assets. Its PowerPoint exports are clean, the templates are endless, and you probably already live in it.
One more honest tip: skip Tome — its AI presentation product shut down in April 2025. If you want a third option, Beautiful.ai (about $12/month billed annually) auto-rebalances slides for recurring business decks.
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