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Google Gemini 3.5 Flash VS Z.ai GLM 5

Gemini 3.5 Flash vs GLM 5: 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.

Gemini 3.5 Flash wins 18 of 22 task areas we tested; GLM 5 takes 4. GLM 5 costs 4.2× less per token ($2.52 vs $10.5 per 1M).

18
Task areas won
4
71
Avg percentile
49
0
Top-3 finishes
0
$10.5
Price / 1M tokens
$2.52
Google
Provider
Z.ai

GLM 5 costs 4.2× less per token ($2.52 vs $10.5 per 1M).

Task by task

Task area Gemini 3.5 Flash GLM 5 Winner
Frontend & Landing Pages #4 / 109
Usable
#76 / 109
Weak
Gemini 3.5 Flash
Training & Education #7 / 110
Excellent
#67 / 110
Strong
Gemini 3.5 Flash
Structured Output #35 / 113
Excellent
#94 / 113
Strong
Gemini 3.5 Flash
Creative & Comedy #27 / 110 #72 / 110 Gemini 3.5 Flash
AI Strategy #23 / 126
Strong
#66 / 126
Strong
Gemini 3.5 Flash
Executive Assistant #19 / 112
Strong
#62 / 112
Strong
Gemini 3.5 Flash
Legal & HR #73 / 110
Strong
#37 / 110
Excellent
GLM 5
Sales #33 / 110
Strong
#68 / 110
Usable
Gemini 3.5 Flash
Chef / Home Cooking #24 / 126
Usable
#57 / 126
Usable
Gemini 3.5 Flash
Presentations & Decks #17 / 110
Excellent
#49 / 110
Excellent
Gemini 3.5 Flash
RAG, Safety & Grounding #15 / 113
Excellent
#47 / 113
Excellent
Gemini 3.5 Flash
Summarization & Meeting Notes #17 / 110
Excellent
#48 / 110
Excellent
Gemini 3.5 Flash
Landing Pages #40 / 72
Strong
#69 / 72
Needs editing
Gemini 3.5 Flash
Product & Project Management #33 / 110
Strong
#58 / 110
Strong
Gemini 3.5 Flash
Customer Support #12 / 113
Strong
#35 / 113
Strong
Gemini 3.5 Flash
Knowledge & Docs #44 / 110
Strong
#24 / 110
Strong
GLM 5
Research & Competitive Analysis #65 / 110
Usable
#48 / 110
Strong
GLM 5
Content & Brand #46 / 124
Strong
#60 / 124
Strong
Gemini 3.5 Flash
Data & Analytics #34 / 110
Excellent
#43 / 110
Excellent
Gemini 3.5 Flash
Coding #28 / 115
Strong
#36 / 115
Strong
Gemini 3.5 Flash
Investor & Pitch #56 / 66
Usable
#62 / 66
Usable
Gemini 3.5 Flash
Translation & Localization #30 / 110
Excellent
#26 / 110
Excellent
GLM 5

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?

Across 22 task areas we benchmarked, Gemini 3.5 Flash ranks higher in 18 and GLM 5 in 4.

Which is cheaper, Gemini 3.5 Flash or GLM 5?

GLM 5 costs 4.2× less per token ($2.52 vs $10.5 per 1M).

What is Gemini 3.5 Flash better at?

Gemini 3.5 Flash out-ranks GLM 5 at Frontend & Landing Pages, Training & Education, Structured Output.

What is GLM 5 better at?

GLM 5 out-ranks Gemini 3.5 Flash at Legal & HR, Knowledge & Docs, Research & Competitive Analysis.

Full Gemini 3.5 Flash review → Full GLM 5 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