Disclosure: This page mentions Gamma. We have applied, or plan to apply, to join affiliate programmes for some tools. If accepted, we may earn a commission when you sign up through our links, at no extra cost to you. We have not been accepted into any programme yet, so no link on this page is an affiliate link. Commissions never change our scores. Full disclosure
Provisional: 1 test run. Every score below comes from a single run of our own test. See how we test.
The test
Build a 6-slide deck with a chart and speaker notes from a short fact brief, without adding facts that are not in the brief.
Results
| Tool | Plan tested | Score |
|---|---|---|
| ChatGPT | "Instant" model | 85/100 Provisional: 1 test run |
| Claude | Opus, paid Max plan | 84/100 Provisional: 1 test run |
| Gamma | Free plan (400 credits) | 83/100 Provisional: 1 test run |
ChatGPT: 85/100 (Provisional: 1 test run)
Used only the facts in the brief and made a correct, editable chart. PowerPoint export only; speaker notes stayed in the chat.
| Criterion | Points |
|---|---|
| Fact fidelity | 30/30 |
| Visual and structure | 18/25 |
| Chart | 18/20 |
| Export | 12/15 |
| Friction | 7/10 |
Claude: 84/100 (Provisional: 1 test run)
Exports PDF, PowerPoint and more, with notes in the deck. Added unrequested specifics (flagged as placeholders); chart drawn from shapes.
| Criterion | Points |
|---|---|
| Fact fidelity | 24/30 |
| Visual and structure | 20/25 |
| Chart | 16/20 |
| Export | 15/15 |
| Friction | 9/10 |
Gamma: 83/100 (Provisional: 1 test run)
The most polished deck, with a correct native chart and free PDF export. Added claims not in the brief, such as "audited sales", and left one placeholder line. Used 79 of 400 free credits.
| Criterion | Points |
|---|---|
| Fact fidelity | 21/30 |
| Visual and structure | 24/25 |
| Chart | 19/20 |
| Export | 13/15 |
| Friction | 6/10 |
Caveats
Scores are close; treat the order as provisional. We plan a second run of every tool before treating any ranking as settled.