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Google Gemini 3.5 Flash VS Z.ai GLM 5.2

Gemini 3.5 Flash vs GLM 5.2: 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 12 of 22 task areas we tested; Gemini 3.5 Flash takes 10. GLM 5.2 costs 2.8× less per token ($3.76 vs $10.5 per 1M).

10
Task areas won
12
71
Avg percentile
74
0
Top-3 finishes
0
$10.5
Price / 1M tokens
$3.76
Google
Provider
Z.ai

GLM 5.2 costs 2.8× less per token ($3.76 vs $10.5 per 1M).

Task by task

Task area Gemini 3.5 Flash GLM 5.2 Winner
Legal & HR #73 / 110
Strong
#36 / 110
Excellent
GLM 5.2
Chef / Home Cooking #24 / 126
Usable
#59 / 126
Usable
Gemini 3.5 Flash
Investor & Pitch #56 / 66
Usable
#24 / 66
Strong
GLM 5.2
Content & Brand #46 / 124
Strong
#19 / 124
Strong
GLM 5.2
Executive Assistant #19 / 112
Strong
#43 / 112
Strong
Gemini 3.5 Flash
Knowledge & Docs #44 / 110
Strong
#21 / 110
Strong
GLM 5.2
Product & Project Management #33 / 110
Strong
#11 / 110
Excellent
GLM 5.2
Training & Education #7 / 110
Excellent
#29 / 110
Excellent
Gemini 3.5 Flash
Creative & Comedy #27 / 110 #46 / 110 Gemini 3.5 Flash
Research & Competitive Analysis #65 / 110
Usable
#50 / 110
Usable
GLM 5.2
Frontend & Landing Pages #4 / 109
Usable
#18 / 109
Needs editing
Gemini 3.5 Flash
Landing Pages #40 / 72
Strong
#26 / 72
Strong
GLM 5.2
AI Strategy #23 / 126
Strong
#34 / 126
Strong
Gemini 3.5 Flash
Structured Output #35 / 113
Excellent
#25 / 113
Excellent
GLM 5.2
RAG, Safety & Grounding #15 / 113
Excellent
#6 / 113
Excellent
GLM 5.2
Presentations & Decks #17 / 110
Excellent
#25 / 110
Excellent
Gemini 3.5 Flash
Summarization & Meeting Notes #17 / 110
Excellent
#9 / 110
Excellent
GLM 5.2
Data & Analytics #34 / 110
Excellent
#41 / 110
Excellent
Gemini 3.5 Flash
Sales #33 / 110
Strong
#39 / 110
Usable
Gemini 3.5 Flash
Coding #28 / 115
Strong
#23 / 115
Strong
GLM 5.2
Customer Support #12 / 113
Strong
#16 / 113
Strong
Gemini 3.5 Flash
Translation & Localization #30 / 110
Excellent
#28 / 110
Excellent
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 Gemini 3.5 Flash better than GLM 5.2?

Across 22 task areas we benchmarked, GLM 5.2 ranks higher in 12 and Gemini 3.5 Flash in 10.

Which is cheaper, Gemini 3.5 Flash or GLM 5.2?

GLM 5.2 costs 2.8× less per token ($3.76 vs $10.5 per 1M).

What is Gemini 3.5 Flash better at?

Gemini 3.5 Flash out-ranks GLM 5.2 at Chef / Home Cooking, Executive Assistant, Training & Education.

What is GLM 5.2 better at?

GLM 5.2 out-ranks Gemini 3.5 Flash at Legal & HR, Investor & Pitch, Content & Brand.

Full Gemini 3.5 Flash review → Full GLM 5.2 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