Short answer: GPT-5.6 Luna is 21x cheaper (0.038¢ vs 0.79¢ a chat). GPT-5.6 Luna ranks higher overall (#14 vs #15). GPT-5.6 Luna wins at coding, maths, following instructions. Grok 4.7 wins at reasoning, writing. GPT-5.6 Luna is the better all-rounder for the money, but Grok 4.7 is worth it if you mostly need reasoning, writing.
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 —
XXAIGANG
GROK 4.7
XAI GANG
CRAPGPT.LOLINDEPENDENT AI MODEL REVIEWS
CRAP SCORE484 SOURCES
REALQUESTIONS.BOLDERANSWERS.
HIGHERCEILINGS.HARDERPROBLEMS.
POWER61ARENA · EPOCH · AA · CRAPGPT
Reasoning
71
Code
64
Writing
61
Instruction
47
Math
47
Value
22
BOSS★★★
REASONER / CODER
0.79¢ per chat · 126 chats per NZ$1
“See the whole pattern.”
Every model is somebody.
— CRAPGPT.LOL —
GPT-5.6 Luna
Grok 4.7
Cost per chat (NZD)
0.038¢
0.79¢
Chats per NZ$1
2,638
126
Overall rank
#14
#15
Vendor
OpenAI
xAI
Speciality
Writing
Reasoning
Reasoning
66
71
Code
66
64
Math
73
47
Writing
55
61
Instruction
60
47
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 Grok 4.7?
GPT-5.6 Luna costs 0.038¢ per typical chat versus 0.79¢ for Grok 4.7 on CrapGPT (NZD, measured token use).
Which is better, GPT-5.6 Luna or Grok 4.7?
GPT-5.6 Luna ranks higher overall on CrapGPT's blended benchmark score. By category: GPT-5.6 Luna leads at coding, maths, following instructions; Grok 4.7 leads at reasoning, writing.
Can I try GPT-5.6 Luna and Grok 4.7 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.
