Grok 4.6 (high) vs GLM-5
Should you write with Grok 4.6 (high) or GLM-5? 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 4.6 (high) leads overall, 85.9 to 82.8.
The verdict
Grok 4.6 (high) scores higher everywhere except the opening. It sits at #53 against #66 for GLM-5 and takes eight of the nine metrics, with the widest gaps in visual cues and continuity, six to eight points each. GLM-5's one win is the hook, by more than eight points, and that's Grok's recurring weak spot in these comparisons, so plan on writing your own intro. GLM-5 is open weights and costs $0.050 per script against $0.211.
Pick Grok 4.6 (high) for better structure, flow and visual cues, with an intro you rewrite yourself.
Pick GLM-5 for a stronger opening, open weights, and a lower 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 4.6 (high), orange is GLM-5, 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, Tone & Voice Match does the most to put Grok 4.6 (high) ahead: it leads there by 4.3 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 4.6 (high) costs about 4.2x as much per script as GLM-5.
| Grok 4.6 (high) | GLM-5 | |
|---|---|---|
| Overall / 100 | 85.9 | 82.8 |
| Writing Elo | 1970 | 1692 |
| Score spread across drafts (± overall std) | 2.980 | 2.400 |
| Cost per script (USD) | 0.211 | 0.050 |
| Avg time per script (min) | 3.6 | 3.1 |
| 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 4.6 (high) · GLM-5. The whole scoring pipeline is on the methodology page.
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