SlidesGPT vs Gamma

Getting to a deck

Gamma asks what you want to build before you write anything: a presentation, webpage, document, social post or graphic. You pick the slide count up front, ten by default. It then writes an editable outline and only generates the deck once you approve it, which is the same outline-first shape SlidesGPT uses.

• The outline step consumed no credits; only the final generation did
• The outline was specific and accurate, with the April 1976 founding, the Apple I at $666.66, the 1998 iMac and the 2018 trillion-dollar market cap
• Generating the ten slides took a little under a minute

The design is genuinely good

This is Gamma's real strength and it deserves saying plainly. Every slide came back with a bespoke AI-generated illustration rather than a stock photo or an empty placeholder, and the titles were written editorially rather than mechanically: The Garage Genesis, The Near-Collapse, The Revenue Machine. Straight out of the generator it looked like something you could put in front of people.

What the free plan actually buys you

The account started with 400 credits. After one ten-slide deck the balance read 348, so this single generation cost 52 credits. On the free plan those 400 credits do not renew, which works out to roughly seven decks in total before you have to pay.

Then we opened the PowerPoint export

Gamma offers PDF, PowerPoint and Google Slides, and export is available on the free plan. But the dialog describes what you get as a static copy of the page, and before you download anything Gamma raises a warning of its own accord:

5 slides have overflowing content. Layouts may shift after exporting to PowerPoint and Google Slides.

Five of the ten slides, including the one we asked for

Expanding that warning names them: slide 3 The Rise and The Rift, 4 The Near-Collapse, 7 The Cook Era, 8 The Revenue Machine and 9 Modern Apple. Half the deck. Slide 8 is the revenue slide the prompt specifically asked for, so the one slide the brief called out by name is among those Gamma expects to shift on the way into PowerPoint.

What you see is not what you get

We exported the deck and opened it in PowerPoint. Because Gamma's slides are taller than a PowerPoint canvas, the export scales them down to fit, and that is the crux: the file you hand over is not the deck you approved on screen. Text that was comfortable in the browser arrives compressed into narrow columns on the flagged slides, and on the free plan every slide also carries a Made with Gamma badge.

Why this happens, in Gamma's own words

This is less a bug than the architecture, and Gamma explains it during onboarding. Its slides are elastic and built from stacked blocks, closer to a web page than to a fixed slide canvas. PowerPoint slides are a fixed size holding positioned shapes, so content that was free to grow in a browser has to be scaled or reflowed when it lands on a 16:9 canvas.

Gamma uses slides to contain your content. Slides here have zero limitations — they can grow or shrink to fit your content.

What that means in practice

If your deck will live at a web link, none of this matters and Gamma is an excellent choice. If the deliverable is a PowerPoint file that someone else will edit, you lose the guarantee that the file matches the preview, and on this deck you would be reformatting about half of it. SlidesGPT composes on a fixed slide canvas from the start, so the preview and the exported PowerPoint, Google Slides or Keynote file are the same layout, and no scaling step sits in between.