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Z.ai GLM 5.2 VS xAI Grok 4.20

GLM 5.2 vs Grok 4.20: which wins at real work?

22 task areas · same graded test runs · rank comparison only, so 0–100 and Elo collections never mix raw scores.

GLM 5.2 wins 21 of 22 task areas we tested; Grok 4.20 takes 1. Grok 4.20 costs 1.0× less per token ($3.75 vs $3.76 per 1M).

21
Task areas won
1
74
Avg percentile
30
0
Top-3 finishes
0
$3.76
Price / 1M tokens
$3.75
Z.ai
Provider
xAI

Grok 4.20 costs 1.0× less per token ($3.75 vs $3.76 per 1M).

Task by task

Task area GLM 5.2 Grok 4.20 Winner
Content & Brand #19 / 124
Strong
#118 / 124
Needs editing
GLM 5.2
RAG, Safety & Grounding #6 / 113
Excellent
#96 / 113
Strong
GLM 5.2
Summarization & Meeting Notes #9 / 110
Excellent
#85 / 110
Excellent
GLM 5.2
Translation & Localization #28 / 110
Excellent
#98 / 110
Strong
GLM 5.2
Coding #23 / 115
Strong
#86 / 115
Usable
GLM 5.2
Data & Analytics #41 / 110
Excellent
#102 / 110
Excellent
GLM 5.2
Training & Education #29 / 110
Excellent
#88 / 110
Strong
GLM 5.2
Customer Support #16 / 113
Strong
#68 / 113
Usable
GLM 5.2
Legal & HR #36 / 110
Excellent
#87 / 110
Strong
GLM 5.2
Creative & Comedy #46 / 110 #96 / 110 GLM 5.2
Knowledge & Docs #21 / 110
Strong
#70 / 110
Usable
GLM 5.2
Sales #39 / 110
Usable
#85 / 110
Usable
GLM 5.2
Product & Project Management #11 / 110
Excellent
#56 / 110
Strong
GLM 5.2
Chef / Home Cooking #59 / 126
Usable
#100 / 126
Needs editing
GLM 5.2
Executive Assistant #43 / 112
Strong
#83 / 112
Usable
GLM 5.2
Landing Pages #26 / 72
Strong
#66 / 72
Usable
GLM 5.2
Investor & Pitch #24 / 66
Strong
#59 / 66
Usable
GLM 5.2
AI Strategy #34 / 126
Strong
#59 / 126
Strong
GLM 5.2
Structured Output #25 / 113
Excellent
#48 / 113
Excellent
GLM 5.2
Presentations & Decks #25 / 110
Excellent
#46 / 110
Excellent
GLM 5.2
Frontend & Landing Pages #18 / 109
Needs editing
#15 / 109
Needs editing
Grok 4.20
Research & Competitive Analysis #50 / 110
Usable
#52 / 110
Usable
GLM 5.2

Rank = position among every model config we tested in that task area (lower is better). Sorted by biggest gap first.

Frequently asked

Is GLM 5.2 better than Grok 4.20?

Across 22 task areas we benchmarked, GLM 5.2 ranks higher in 21 and Grok 4.20 in 1.

Which is cheaper, GLM 5.2 or Grok 4.20?

Grok 4.20 costs 1.0× less per token ($3.75 vs $3.76 per 1M).

What is GLM 5.2 better at?

GLM 5.2 out-ranks Grok 4.20 at Content & Brand, RAG, Safety & Grounding, Summarization & Meeting Notes.

What is Grok 4.20 better at?

Grok 4.20 out-ranks GLM 5.2 at Frontend & Landing Pages.

Full GLM 5.2 review → Full Grok 4.20 review → Full model leaderboard →

More comparisons

This page is Spring Prompt, running in public

We just did this for every model. Do it for your prompt.

The rankings above come from running real tasks through real models and scoring every output. Spring Prompt is that same engine — pointed at your prompt, your test cases, and your definition of good.

  • Generate test cases from your prompt — no eval set required to start.
  • Compare models side by side with quality, cost and latency in one matrix.
  • Optimise the winner until the scores say it's ready to ship.
Experiment · Cold outreach email

Prompt × model results

12 test cases · 3 evals
Claude Opus
GPT-5
Gemini
v1
7.1
6.8
7.4
v2
8.3
7.9
8.0
v3
9.2
8.6
8.4
Best combo: v3 × Claude Opus
9.2 quality · $0.004/run · 1.8s