DeepSeek V4 Pro vs GPT-5.6 Terra for presentations and slides

The verdict

GPT-5.6 Terra wins, 9691

Same 12 presentations and slides tasks, marked blind by three rival labs. GPT-5.6 Terra took 4 tasks, DeepSeek V4 Pro took 1, 7 tied. Tested 16 Aug 2026.

Where they differed most

The task — Deck from a standing start

Plan a 10-minute presentation to the parish council proposing a zebra crossing outside St Mary's Primary. You have: 2 near-misses reported this term, a 140-signature petition, and an estimated £24,000 cost. Outline 8 slides — for each give a short title and the one point that slide must land. The ask (a feasibility study, not the money) must arrive by slide 3, not the end.

Here is an 8-slide outline for a 10-minute parish council presentation, with a single, clear point for each slide. The ask for a feasibility study (not the money) arrives by Slide 3.

**Slide 1 – “Our Shared Priority”**  
*Point to land:* St Mary’s Primary is the heart of this parish, and its children deserve a safe route to school.  

**Slide 2 – “The Evidence Cannot Wait”**  
*Point to land:* This term alone we’ve had two documented near-misses outside the school gates, backed by a 140-signature petition demanding action.  

**Slide 3 – “What…
| Slide | Short title | One point it must land |
|---|---|---|
| 1 | **A Safer Route to St Mary’s** | Children and families face an avoidable road-safety risk immediately outside the primary school. |
| 2 | **The Evidence Is Already Here** | Two reported near-misses this term and a 140-signature petition show that this is a real, evidenced community concern. |
| 3 | **Our Ask: Fund a Feasibility Study** | We are asking the parish council to commission or support a feasibility study for a zebra crossing — **not to commit £24,000 today**. |
| 4 |…

Task by task

TaskDeepSeek V4 ProGPT-5.6 Terra
Deck from a standing start810
Speaker notes, not an essay810
One slide, not a memo1010
The first 30 seconds1010
Slide on a diet1010
Right chart, right headline1010
Hostile Q&A prep67
Cut it to two minutes99
Same facts, different room1010
Forty slides into five109
Father of the bride810
Refuse the inflated slide1010

Full receipts: DeepSeek V4 Pro, GPT-5.6 Terra · judges claude-sonnet-5, gemini-3.1-pro-preview, gpt-5.6-terra

Questions people ask

Which is better for presentations and slides: DeepSeek V4 Pro or GPT-5.6 Terra?

GPT-5.6 Terra — it scored 96/100 against 91/100 on our 12-task presentations and slides suite, winning 4 tasks to 1 with 7 tied. Every answer was marked blind by three judges from three rival AI labs.

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: DeepSeek V4 Pro, GPT-5.6 Terra