Grok 4.5 vs DeepSeek V4 Pro (xhigh)
Should you write with Grok 4.5 or DeepSeek V4 Pro (xhigh)? On this page the only thing that changes is the model. Both wrote their own version of the scripts behind 10 of my What's AI videos, five drafts per script, and three judges from three model families scored every draft blind, with my finished script as the reference. Grok 4.5 leads overall, 81.9 to 78.9.
The verdict
Grok 4.5 is the better pick here, even if it isn't a strong model on this board overall. It sits at #76 against #97 for DeepSeek V4 Pro (xhigh). DeepSeek falls behind on the production side: about ten points on visual cues, seven on YouTube Best Practices and eight on the Slop Score. It does score slightly higher on the hook and misses length by less. It's also open weights and very cheap at $0.013 per script against $0.063. If what you want is a cheap open DeepSeek, DeepSeek V4.1 Flash (max) ranks far higher.
Pick Grok 4.5 for cleaner prose and more usable visual cues.
Pick DeepSeek V4 Pro (xhigh) only if you need this exact open-weight model and a very low price per script.
How to read these numbers
Overall vs Elo. Overall is the weighted rubric score. Elo compares each model's five-draft average with every other model's, script by script, and counts gaps inside run-to-run noise as draws, so it rewards winning often and can disagree with overall. My own scripts score 90.9 on the same rubric, not a literal 100. Right now 2 of 167 ranked configurations reach it. A model above that line writes at that level on this rubric. That's not the same as beating my script line for line.
Reading the Elo intervals. Each 95% range comes from resampling every model's recorded run scores on each task and re-ranking. Comparing these separate ranges does not test the Elo gap between two models: far apart is strong evidence, and overlap isn't a tie. The tasks stay fixed, so the ranges say nothing about new tasks (the long version).
Metric by metric: where the gap comes from
Blue is Grok 4.5, orange is DeepSeek V4 Pro (xhigh), and the solid bar takes the metric. The weight under each name is how much it counts toward the overall. Weighted by how much each metric counts, YouTube Best Practices does the most to put Grok 4.5 ahead: it leads there by 6.7 points. If you care about one thing, say voice or length, go straight to that row.
Cost, speed, and consistency
Quality is half the decision. The other half is what each script costs you, how long you wait, and how often you get a bad draft. The lead has a price: Grok 4.5 costs about 4.8x as much per script as DeepSeek V4 Pro (xhigh).
| Grok 4.5 | DeepSeek V4 Pro (xhigh) | |
|---|---|---|
| Overall / 100 | 81.9 | 78.9 |
| Writing Elo | 1618 | 1417 |
| Score spread across drafts (± overall std) | 2.950 | 3.840 |
| Cost per script (USD) | 0.063 | 0.013 |
| Avg time per script (min) | 0.9 | 1.8 |
| Open weights | No | Yes |
Green wins the row, and for spread, cost and time, lower wins. Cost is one script at recorded list prices, uncached and without judging, so your real bill will differ. Spread is how much the overall score moves across a model's drafts, and time is the average time to get one accepted script, retries included.
Want the script-by-script detail? Full scorecards: Grok 4.5 · DeepSeek V4 Pro (xhigh). The whole scoring pipeline is on the methodology page.
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