Grok 4.5 vs MiniMax M3
Should you write with Grok 4.5 or MiniMax M3? 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. MiniMax M3 leads overall, 82.7 to 81.9. Their per-model Elo intervals overlap on this board.
The verdict
The board can't really separate these two, and I'd still lean MiniMax M3. It ranks #71 against #76, but with overlapping Elo ranges that order is soft. The practical difference is length: Grok 4.5 is more than sixteen points behind on Length Adherence, and MiniMax scores better on the hook too. Grok leads on substance and the Slop Score. The tiebreakers go to MiniMax: open weights and roughly $0.023 per script against $0.063. If your editor trims every script anyway, Grok's substance is worth a look.
Pick Grok 4.5 when substance and clean phrasing matter more than hitting the length target.
Pick MiniMax M3 for better length control and hooks, open weights, and the lower price.
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 MiniMax M3, 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, Length Adherence does the most to put MiniMax M3 ahead: it leads there by 16.5 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. MiniMax M3 is ahead and it's also the cheaper one: Grok 4.5 costs about 2.7x as much per script.
| Grok 4.5 | MiniMax M3 | |
|---|---|---|
| Overall / 100 | 81.9 | 82.7 |
| Writing Elo | 1618 | 1672 |
| Score spread across drafts (± overall std) | 2.950 | 1.980 |
| Cost per script (USD) | 0.063 | 0.023 |
| 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 · MiniMax M3. The whole scoring pipeline is on the methodology page.
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