Short answer: GLM 5.3 Flash is 18x cheaper (0.040¢ vs 0.71¢ a chat). Claude Sonnet 5 ranks higher overall (#9 vs #10). Claude Sonnet 5 wins at reasoning, maths, writing. GLM 5.3 Flash wins at following instructions, agentic tasks. Pick GLM 5.3 Flash for everyday use and Claude Sonnet 5 when quality matters most.
AANTHROPICGANG
CLAUDE SONNET 5
ANTHROPIC GANG
CRAPGPT.LOLINDEPENDENT AI MODEL REVIEWS
CRAP SCORE574 SOURCES
THINKDEEPERWRITECLEANERBUILD SAFER
SAFERIDEASA MOREHUMANTOMORROW
POWER70ARENA · EPOCH · AA · CRAPGPT
Instruction
75
Reasoning
74
Writing
72
Code
70
Agentic
69
Value
34
LIEUTENANT★★★★
GENERALIST / EXECUTOR
0.71¢ per chat · 141 chats per NZ$1
“Ask me anything. Pay less.”
Every model is somebody.
— CRAPGPT.LOL —
ZZ.AIGANG
GLM 5.3 FLASH
Z.AI GANG
CRAPGPT.LOLINDEPENDENT AI MODEL REVIEWS
CRAP SCORE714 SOURCES
PRECISECALMAHEAD
REASONATSCALE
POWER68ARENA · EPOCH · AA · CRAPGPT
Reasoning
73
Instruction
78
Agentic
77
Code
70
Writing
56
Value
78
SPECIALIST★★★★
REASONER / EXECUTOR
0.040¢ per chat · 2,505 chats per NZ$1
“Deep thought. Low drama.”
Every model is somebody.
— CRAPGPT.LOL —
Claude Sonnet 5
GLM 5.3 Flash
Cost per chat (NZD)
0.71¢
0.040¢
Chats per NZ$1
141
2,505
Overall rank
#9
#10
Vendor
Anthropic
Z.ai
Speciality
General
Reasoning
Crowd Elo
no votes
1012
Reasoning
74
73
Code
70
70
Math
63
52
Writing
72
56
Instruction
75
78
Agentic
69
77
Scores are 0 to 100 percentiles blending LMArena, Epoch AI, Artificial Analysis and CrapGPT's own tests. Updated 2026-10-11.
FAQ
Which is cheaper, Claude Sonnet 5 or GLM 5.3 Flash?
GLM 5.3 Flash costs 0.040¢ per typical chat versus 0.71¢ for Claude Sonnet 5 on CrapGPT (NZD, measured token use).
Which is better, Claude Sonnet 5 or GLM 5.3 Flash?
Claude Sonnet 5 ranks higher overall on CrapGPT's blended benchmark score. By category: Claude Sonnet 5 leads at reasoning, maths, writing; GLM 5.3 Flash leads at following instructions, agentic tasks.
Can I try Claude Sonnet 5 and GLM 5.3 Flash side by side?
Yes. CrapGPT's card battle sends one prompt to two models and lets you pick the winner, paying only for the two replies.
