Short answer: GPT-5.6 Luna is about the same price (0.038¢ vs 0.040¢ a chat). GLM 5.3 Flash ranks higher overall (#10 vs #14). GPT-5.6 Luna wins at maths. GLM 5.3 Flash wins at reasoning, coding, writing, following instructions, agentic tasks. Pick GPT-5.6 Luna for everyday use and GLM 5.3 Flash when quality matters most.
OOPENAIGANG
GPT-5.6 LUNA
OPENAI GANG
CRAPGPT.LOLINDEPENDENT AI MODEL REVIEWS
CRAP SCORE674 SOURCES
INTELLIGENCEPEOPLETOOLSA BRIGHTERTOMORROW.
BETTERIDEASHIGHERPEOPLE
POWER64ARENA · EPOCH · AA · CRAPGPT
Writing
55
Math
73
Code
66
Reasoning
66
Instruction
60
Value
74
SPECIALIST★★★★
WRITER / ANALYST
0.038¢ per chat · 2,638 chats per NZ$1
“Say it once. Say it right.”
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 —
GPT-5.6 Luna
GLM 5.3 Flash
Cost per chat (NZD)
0.038¢
0.040¢
Chats per NZ$1
2,638
2,505
Overall rank
#14
#10
Vendor
OpenAI
Z.ai
Speciality
Writing
Reasoning
Crowd Elo
no votes
1012
Reasoning
66
73
Code
66
70
Math
73
52
Writing
55
56
Instruction
60
78
Agentic
57
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, GPT-5.6 Luna or GLM 5.3 Flash?
GPT-5.6 Luna costs 0.038¢ per typical chat versus 0.040¢ for GLM 5.3 Flash on CrapGPT (NZD, measured token use).
Which is better, GPT-5.6 Luna or GLM 5.3 Flash?
GLM 5.3 Flash ranks higher overall on CrapGPT's blended benchmark score. By category: GPT-5.6 Luna leads at maths; GLM 5.3 Flash leads at reasoning, coding, writing, following instructions, agentic tasks.
Can I try GPT-5.6 Luna 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.
