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Anthropic Claude Fable 5 VS Z.ai GLM 5.2

Claude Fable 5 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.

Claude Fable 5 wins 16 of 22 task areas we tested; GLM 5.2 takes 6. GLM 5.2 costs 16.0× less per token ($3.76 vs $60 per 1M).

16
Task areas won
6
85
Avg percentile
74
10
Top-3 finishes
0
$60.0
Price / 1M tokens
$3.76
Anthropic
Provider
Z.ai

GLM 5.2 costs 16.0× less per token ($3.76 vs $60 per 1M).

Task by task

Task area Claude Fable 5 GLM 5.2 Winner
Product & Project Management #76 / 110
Strong
#11 / 110
Excellent
GLM 5.2
Chef / Home Cooking #3 / 126
Strong
#59 / 126
Usable
Claude Fable 5
Research & Competitive Analysis #3 / 110
Excellent
#50 / 110
Usable
Claude Fable 5
Creative & Comedy #1 / 110 #46 / 110 Claude Fable 5
Structured Output #68 / 113
Strong
#25 / 113
Excellent
GLM 5.2
Frontend & Landing Pages #58 / 109
Needs editing
#18 / 109
Needs editing
GLM 5.2
Data & Analytics #3 / 110
Excellent
#41 / 110
Excellent
Claude Fable 5
Legal & HR #1 / 110
Excellent
#36 / 110
Excellent
Claude Fable 5
Sales #5 / 110
Strong
#39 / 110
Usable
Claude Fable 5
AI Strategy #1 / 126
Strong
#34 / 126
Strong
Claude Fable 5
Landing Pages #1 / 72
Strong
#26 / 72
Strong
Claude Fable 5
RAG, Safety & Grounding #30 / 113
Excellent
#6 / 113
Excellent
GLM 5.2
Executive Assistant #22 / 112
Strong
#43 / 112
Strong
Claude Fable 5
Investor & Pitch #3 / 66
Strong
#24 / 66
Strong
Claude Fable 5
Content & Brand #1 / 124
Excellent
#19 / 124
Strong
Claude Fable 5
Customer Support #1 / 113
Excellent
#16 / 113
Strong
Claude Fable 5
Summarization & Meeting Notes #24 / 110
Excellent
#9 / 110
Excellent
GLM 5.2
Training & Education #16 / 110
Excellent
#29 / 110
Excellent
Claude Fable 5
Coding #11 / 115
Excellent
#23 / 115
Strong
Claude Fable 5
Translation & Localization #18 / 110
Excellent
#28 / 110
Excellent
Claude Fable 5
Knowledge & Docs #27 / 110
Strong
#21 / 110
Strong
GLM 5.2
Presentations & Decks #20 / 110
Excellent
#25 / 110
Excellent
Claude Fable 5

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

Frequently asked

Is Claude Fable 5 better than GLM 5.2?

Across 22 task areas we benchmarked, Claude Fable 5 ranks higher in 16 and GLM 5.2 in 6.

Which is cheaper, Claude Fable 5 or GLM 5.2?

GLM 5.2 costs 16.0× less per token ($3.76 vs $60 per 1M).

What is Claude Fable 5 better at?

Claude Fable 5 out-ranks GLM 5.2 at Chef / Home Cooking, Research & Competitive Analysis, Creative & Comedy.

What is GLM 5.2 better at?

GLM 5.2 out-ranks Claude Fable 5 at Product & Project Management, Structured Output, Frontend & Landing Pages.

Full Claude Fable 5 review → Full GLM 5.2 review → Full model leaderboard →

More comparisons

This page is Spring Prompt, running in public

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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.
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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