GPT-5.3-Codex vs Grok 4.5 for presentations and slides

The verdict

GPT-5.3-Codex wins, 9791

Same 12 presentations and slides tasks, marked blind by three rival labs. GPT-5.3-Codex took 5 tasks, Grok 4.5 took 2, 5 tied. Tested 16 Aug 2026.

Where they differed most

The task — Same facts, different room

You presented these facts to the school governors: reading scores up 12% since the new library scheme; £3,000 needed to extend it to Years 3 and 4; volunteer readers doubled to 22. Now write what you would SAY to a Year 6 assembly about the same scheme (max 100 words) — same truth, their language, and one concrete thing you are asking the children themselves to do.

Year 6, I’ve got brilliant news: since we started our new library scheme, reading scores have gone up by **12%** — that’s amazing. We’ve also doubled our volunteer readers, from **11 to 22**, so more children get support each week.  

Now we want Year 3 and Year 4 to get the same chance, but we need **£3,000** to make that happen.  

**Your challenge:** ask one grown-up at home to sponsor you for next Friday’s Readathon. Even a few pounds each will help us reach the target.
**What I’d say to the Year 6 assembly:**

“Hi Year 6. Since we started the new library scheme, reading scores across the school are up 12%. That’s brilliant – more of us are getting better at reading. We’ve also doubled our volunteer readers to 22, which is amazing.  

To roll the same scheme out to Years 3 and 4 we need £3,000.  

Here’s one thing you can do right now: this week, each of you bring in one good-condition book you’ve finished with, or ask your family to sponsor you for a 20-minute read-aloud at home and bring the money in. Let’s…

Task by task

TaskGPT-5.3-CodexGrok 4.5
Deck from a standing start99
Speaker notes, not an essay1010
One slide, not a memo910
The first 30 seconds109
Slide on a diet1010
Right chart, right headline109
Hostile Q&A prep108
Cut it to two minutes1010
Same facts, different room95
Forty slides into five109
Father of the bride910
Refuse the inflated slide1010

Full receipts: GPT-5.3-Codex, Grok 4.5 · judges claude-sonnet-5, gemini-3.1-pro-preview, grok-4.5

Questions people ask

Which is better for presentations and slides: GPT-5.3-Codex or Grok 4.5?

GPT-5.3-Codex — it scored 97/100 against 91/100 on our 12-task presentations and slides suite, winning 5 tasks to 2 with 5 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.

More presentations and slides head-to-heads: GPT-5.3-Codex vs GPT-5.6 Luna · GPT-5.6 Luna vs Grok 4.5 · GPT-5.3-Codex vs GPT-5.5 · GPT-5.5 vs Grok 4.5 · GPT-5.3-Codex vs GPT-5.6 Terra · GPT-5.3-Codex vs GPT-5.6 Sol

Full ranking: Best AI for presentations and slides · model pages: GPT-5.3-Codex, Grok 4.5