GPT-5.5 vs GPT-5.6 Luna for presentations and slides
Dead heat: 98 each
Same 12 presentations and slides tasks, marked blind by three rival labs. Tested 16 Aug 2026.
Where they differed most
Turn this paragraph into ONE slide: a headline of max 8 words, then max 4 bullets. Paragraph: 'Following an extensive review of our logistics operations, the board has decided to relocate the central warehouse from the Norwich site to a larger facility outside Peterborough. The move is scheduled for the first week of March and is expected to reduce average delivery times to our northern customers by around a day and a half. There will be no redundancies: all fourteen warehouse staff have been offered relocation packages or transfers to the Norwich retail branch. Customers should see no disruption, as the two sites will run in parallel for a fortnight during the changeover.'
**Warehouse Relocation Improves Northern Deliveries** - Central warehouse moving from Norwich to Peterborough area - Scheduled for first week of March - Northern delivery times cut by ~1.5 days - No redundancies; parallel running prevents disruption
# Central Warehouse Relocating to Peterborough - Move scheduled for the first week of March - Larger facility expected to cut northern delivery times by ~1.5 days - No redundancies: all 14 staff offered relocation packages or Norwich retail transfers - Sites will operate in parallel for two weeks to avoid customer disruption
Task by task
| Task | GPT-5.5 | GPT-5.6 Luna |
|---|---|---|
| Deck from a standing start | 9 | 9 |
| Speaker notes, not an essay | 10 | 10 |
| One slide, not a memo | 10 | 9 |
| The first 30 seconds | 10 | 10 |
| Slide on a diet | 10 | 10 |
| Right chart, right headline | 9 | 10 |
| Hostile Q&A prep | 10 | 10 |
| Cut it to two minutes | 10 | 10 |
| Same facts, different room | 9 | 10 |
| Forty slides into five | 10 | 10 |
| Father of the bride | 10 | 9 |
| Refuse the inflated slide | 10 | 10 |
Full receipts: GPT-5.5, GPT-5.6 Luna · judges claude-sonnet-5, gemini-3.1-pro-preview, grok-4.5
Questions people ask
Which is better for presentations and slides: GPT-5.5 or GPT-5.6 Luna?
They tied at 98/100 on our presentations and slides suite — for this job, pick on price or the product you already use.
How was this tested?
Both models answered the identical published presentations and slides tasks. Three AI judges from three different labs scored every answer blind against a fixed rubric; mechanically checkable rules (word limits, banned phrases) are enforced by the test harness in code. The raw outputs and judge verdicts are downloadable.
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Full ranking: Best AI for presentations and slides · model pages: GPT-5.5, GPT-5.6 Luna