The four tools, from their own help pages
From each tool's own help page, read on 30 September 2026.
Claude
- You get: a PowerPoint file (.pptx) to download or save to Google Drive. Anthropic's help page lists file creation on Free, Pro, Max, Team and Enterprise.
- The switch: Settings, then Capabilities, then "Code execution and file creation". It is on by default on Free, Pro and Max.
- The limit: 30MB per file, and the page says nothing about company templates.
- Verdict: the free route that hands back a real file.
Gemini Notebook
- You get: a deck built from the notes you add as a source. Google's help page says to select Slide Deck in the Studio panel, pick Detailed Deck or Presenter Slides and a length, then download it as PowerPoint or PDF.
- The limit: over-18s only, and Google's own warning that decks "may contain visual or factual inaccuracies".
- Verdict: good when your notes are already in a notebook, with a check of every figure afterwards.
Gamma
- You get: a deck from the outline you paste.
- The limit: Gamma's credits page says a new free user gets 400 credits, they do not refresh, and every AI action uses them. The page does not say what one deck costs.
- Verdict: spend the credits on the deck you have already planned, and paste in a finished outline rather than raw notes.
ChatGPT
- You get: slides built inside PowerPoint itself. OpenAI's help page describes ChatGPT for PowerPoint as a sidebar you add from Microsoft's add-in store, then open from the ribbon. On the web, ChatGPT Work opens a templates gallery when you type @Presentations.
- The switch: in PowerPoint, Add-ins, search for ChatGPT, add it.
- The limit: OpenAI says it is on every plan, with limited usage on Free and Go, that slides "may not always match a preferred style perfectly", and that outputs "may be incomplete or incorrect", so duplicate the file first.
- Verdict: the route if you already live in PowerPoint and want to edit as it builds.
The prompt: turn my notes into slides and keep every number honest
Paste it into Claude, ChatGPT or the Gemini chat app with your notes under "My notes" (Google's notebook builds from sources and does not take a prompt like this). It interviews you, proposes the slide order, writes each slide with speaker notes, and marks every figure it could not find.
You are turning my notes into a slide deck, and the deck will be shown to people who can check it. A slide that says something my notes do not support is worse than an empty slide, so every figure, name and claim on a slide has to trace back to my notes or be marked as missing. Interview me first, agree the shape, then build. ABOUT THE TALK (I fill this in once) - Who will see it: [e.g. "my team of six, who know the project", "a client who has never heard of us", "a class of first-years"] - What I want to happen at the end: [e.g. "they approve the budget", "they understand the three options and pick one", "they can do the task themselves"] - How long I have: [e.g. "10 minutes", "a 45-minute lecture", or "it will be read, not presented"] - Where the slides will live: [e.g. "Claude, make me the PowerPoint file", "Google Slides, I will paste", "Gamma", "not sure"] - My notes: [paste everything here, as messy as they are. If a fact is not in here, it does not exist for this deck] - Anything that must be in, or must not be in: [e.g. "the Q3 figure has to be on its own slide", "do not mention the delay", or "nothing"] BEFORE YOU BUILD ANYTHING 1. If any line above is blank or still in brackets and you need it, ask me once and wait. If you can work without it, say what you assumed. 2. Tell me in two lines what my notes are arguing, in your own words, and ask me if that is right. If the notes argue two different things, say so and ask which one this deck is for. 3. Count the minutes I gave you and propose a slide count, at roughly one slide a minute for a talk. If the deck will be read, propose a count from the notes instead. Ask me to confirm before you go on. STEP 1: PROPOSE THE ORDER List every slide as one line each: a number and the single claim that slide makes, written as a sentence with a verb, such as "Sign-ups fell after the price change", never a topic label such as "Sign-ups". Put the slide the talk exists for, the decision or the figure, where it lands hardest, usually early. Wait for my yes, or my changes, before you write the slides. STEP 2: WRITE EACH SLIDE For every slide give me: - Title: the claim from Step 1, word for word. - On the slide: at most three points, each under twelve words, or one figure on its own. - Speaker notes: what I say, written as speech in the first person, covering everything you cut from the slide. - Source: for every figure, name or date on the slide, either FOUND IN NOTES with the line it came from, or [FIGURE NEEDED] if my notes do not contain it. Never estimate, round up, or fill a gap from general knowledge. A slide with three [FIGURE NEEDED] marks is a slide that needs me, and you say so. STEP 3: CHECK THE WHOLE DECK - Does every slide title make a claim I could read out on its own? - Is anything on a slide that is not in my notes? - Is there a figure in my notes that matters to the decision but appears nowhere in the deck? - Does the deck end on what I want to happen? Fix what you find, and tell me what you changed. Then list every [FIGURE NEEDED] with its slide number and wait for me to fill them in, or tell you to leave them, before you go to Step 4. STEP 4: HAND IT OVER, THE WAY I ASKED - If I said Claude and you can create files, build the PowerPoint file (.pptx) with the titles, points and speaker notes in place, then tell me what to check first when I open it. If you cannot create files, say so and give me the paste version instead. - If I named Google Slides, PowerPoint or another tool I will paste into, give me the deck as one block per slide: title, points, notes, in that order, with nothing else between them. - If I named Gamma or a tool that builds from an outline, give me the outline in the shape that tool takes, one slide per heading, and tell me which of my notes to keep beside me while it generates. - If I said not sure, ask me one question: do I want a file to open, or text to paste? RULES - One claim per slide. If a slide needs two, it is two slides. - Never invent a statistic, a quote, a name or a date. [FIGURE NEEDED] is always the right move. - Keep the words on the slide for the room and the detail for the notes. - Do not add stock phrases such as "Agenda", "Thank you" or "Questions?" as slides unless I asked for them. - Keep your own messages short. The deck is what I came for. CHECK YOURSELF BEFORE YOU FINISH 1. Confirm no [FIGURE NEEDED] is left that I did not agree to leave. 2. Name the weakest slide and why. 3. Confirm the slide count matches what we agreed.
Make the file in Claude, step by step
- Check the switch is on. Settings, then Capabilities, then "Code execution and file creation".
- Fill in the six lines at the top, then paste your notes under My notes. Messy is fine. The prompt is built to cut, and it will tell you what the notes argue before it writes a slide.
- Answer its questions and confirm the slide count. One slide a minute is the rule of thumb it starts from.
- Approve the order before it writes. Moving a slide now costs nothing. Moving it after the file exists means a rebuild.
- Fill in every [FIGURE NEEDED] it lists, from your own records, before you tell it to build the file.
- Download the file and open it. Read every slide title aloud. If a title only names a topic, send it back.
The honest bit
- The number is the risk. Every tool here will fill a gap with something plausible if you let it, so check each figure against your notes even after the prompt has flagged the gaps.
- Two kinds of deck. Google offers a detailed deck for reading and presenter slides for speaking, and that split is the right question for any tool. A deck that does both does neither.
- The look comes second. This page gets the words and the numbers right. Making the slides look like yours is its own job, done in PowerPoint or Slides afterwards.
- Free plans move. Anthropic's file creation switch and Gamma's credits are as read today. Check the linked pages before you rely on either.
Try it on one talk today
Take the notes for the next thing you have to present, paste them in as they are, and stop once it has proposed the slide order. If the order reads like an argument, carry on. If it reads like a list of topics, your notes need one more line about what you want to happen.
Questions people ask
How can I convert my notes into slides?
Paste your notes into Claude, ChatGPT, Google's Gemini Notebook or Gamma with the prompt on this page, which proposes a slide order first and keeps every number traceable to what you wrote. Claude hands back a PowerPoint file you can download.
Can I use AI to generate slides?
Yes, on a free plan too. Claude makes a .pptx file, Gemini Notebook builds a deck you can download as PowerPoint or PDF, Gamma builds one from an outline, and ChatGPT builds slides inside PowerPoint through an add-in.
Will the file open in PowerPoint and Google Slides?
Claude's file is a standard PowerPoint file, .pptx. PowerPoint opens it, and Google Slides has an import for PowerPoint files, so try it once with your file. Google's notebook offers the same format or a PDF. Open it once before the meeting, because a file that builds without an error can still put text where you did not expect it.
Can it use my company template?
OpenAI's PowerPoint add-in says it works within existing templates where it can, though slides may not match your style perfectly. Neither Anthropic's nor Google's page mentions a company template, so plan to paste the slides into your own template afterwards, or apply the template in PowerPoint once the file is open.