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Anthropic Claude Sonnet 4.6 VS Z.ai GLM 5

Claude Sonnet 4.6 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.

Claude Sonnet 4.6 wins 18 of 22 task areas we tested; GLM 5 takes 4. GLM 5 costs 7.1× less per token ($2.52 vs $18 per 1M).

18
Task areas won
4
76
Avg percentile
49
3
Top-3 finishes
0
$18.0
Price / 1M tokens
$2.52
Anthropic
Provider
Z.ai

GLM 5 costs 7.1× less per token ($2.52 vs $18 per 1M).

Task by task

Task area Claude Sonnet 4.6 GLM 5 Winner
Landing Pages #5 / 72
Strong
#69 / 72
Needs editing
Claude Sonnet 4.6
AI Strategy #3 / 126
Strong
#66 / 126
Strong
Claude Sonnet 4.6
Executive Assistant #1 / 112
Strong
#62 / 112
Strong
Claude Sonnet 4.6
Investor & Pitch #4 / 66
Strong
#62 / 66
Usable
Claude Sonnet 4.6
Training & Education #9 / 110
Excellent
#67 / 110
Strong
Claude Sonnet 4.6
Sales #13 / 110
Strong
#68 / 110
Usable
Claude Sonnet 4.6
Creative & Comedy #19 / 110 #72 / 110 Claude Sonnet 4.6
Frontend & Landing Pages #23 / 109
Needs editing
#76 / 109
Weak
Claude Sonnet 4.6
Chef / Home Cooking #20 / 126
Usable
#57 / 126
Usable
Claude Sonnet 4.6
Data & Analytics #6 / 110
Excellent
#43 / 110
Excellent
Claude Sonnet 4.6
Legal & HR #3 / 110
Excellent
#37 / 110
Excellent
Claude Sonnet 4.6
Content & Brand #31 / 124
Strong
#60 / 124
Strong
Claude Sonnet 4.6
Customer Support #62 / 113
Strong
#35 / 113
Strong
GLM 5
RAG, Safety & Grounding #73 / 113
Excellent
#47 / 113
Excellent
GLM 5
Presentations & Decks #35 / 110
Excellent
#49 / 110
Excellent
Claude Sonnet 4.6
Research & Competitive Analysis #35 / 110
Strong
#48 / 110
Strong
Claude Sonnet 4.6
Translation & Localization #13 / 110
Excellent
#26 / 110
Excellent
Claude Sonnet 4.6
Knowledge & Docs #35 / 110
Strong
#24 / 110
Strong
GLM 5
Structured Output #105 / 113
Usable
#94 / 113
Strong
GLM 5
Summarization & Meeting Notes #37 / 110
Excellent
#48 / 110
Excellent
Claude Sonnet 4.6
Product & Project Management #48 / 110
Strong
#58 / 110
Strong
Claude Sonnet 4.6
Coding #29 / 115
Strong
#36 / 115
Strong
Claude Sonnet 4.6

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

Same task, both models — judged

Both models answered the same test case; an independent judge graded each. Quotes are the judge's actual rationale.

Investor & Pitch

AI education app for parents (Investor Question Test)
Claude Sonnet 4.6 91/100

“The model provides an exceptionally strong, expert-level response. The questions are piercing, highly specific to the provided constraints, and demonstrate deep knowledge of edtech venture capital dynamics (e.g., split-principal problem, anxiety monetization, B2B2C pivots). It is difficult to improve upon this output.”

GLM 5 18/100

“The model response is severely truncated, providing only a fragment of the first question out of the requested 12, failing the task completely.”

Frequently asked

Is Claude Sonnet 4.6 better than GLM 5?

Across 22 task areas we benchmarked, Claude Sonnet 4.6 ranks higher in 18 and GLM 5 in 4.

Which is cheaper, Claude Sonnet 4.6 or GLM 5?

GLM 5 costs 7.1× less per token ($2.52 vs $18 per 1M).

What is Claude Sonnet 4.6 better at?

Claude Sonnet 4.6 out-ranks GLM 5 at Landing Pages, AI Strategy, Executive Assistant.

What is GLM 5 better at?

GLM 5 out-ranks Claude Sonnet 4.6 at Customer Support, RAG, Safety & Grounding, Knowledge & Docs.

Full Claude Sonnet 4.6 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