Short answer: GLM 5.3 Flash is 16x cheaper (0.040¢ vs 0.63¢ a chat). GLM 5.3 Flash ranks higher overall (#10 vs #11). OpenAI o3 wins at maths. GLM 5.3 Flash wins at reasoning, coding, writing, following instructions, agentic tasks. GLM 5.3 Flash is the better all-rounder for the money, but OpenAI o3 is worth it if you mostly need maths.
OOPENAIGANG
OPENAI O3
OPENAI GANG
CRAPGPT.LOLINDEPENDENT AI MODEL REVIEWS
CRAP SCORE563 SOURCES
INTELLIGENCEPEOPLETOOLSA BRIGHTERTOMORROW.
BETTERIDEASHIGHERPEOPLE
POWER66ARENA · AA · CRAPGPT
Math
82
Agentic
71
Code
64
Reasoning
61
Instruction
54
Value
38
LIEUTENANT★★★★
ANALYST / AGENT
0.63¢ per chat · 159 chats per NZ$1
“Show your working.”
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 —
OpenAI o3
GLM 5.3 Flash
Cost per chat (NZD)
0.63¢
0.040¢
Chats per NZ$1
159
2,505
Overall rank
#11
#10
Vendor
OpenAI
Z.ai
Speciality
Math
Reasoning
Crowd Elo
no votes
1012
Reasoning
61
73
Code
64
70
Math
82
52
Writing
36
56
Instruction
54
78
Agentic
71
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, OpenAI o3 or GLM 5.3 Flash?
GLM 5.3 Flash costs 0.040¢ per typical chat versus 0.63¢ for OpenAI o3 on CrapGPT (NZD, measured token use).
Which is better, OpenAI o3 or GLM 5.3 Flash?
GLM 5.3 Flash ranks higher overall on CrapGPT's blended benchmark score. By category: OpenAI o3 leads at maths; GLM 5.3 Flash leads at reasoning, coding, writing, following instructions, agentic tasks.
Can I try OpenAI o3 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.
