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Grok 4.7 vs GPT-6 Luna

Grok 4.7xAI
GPT-6 LunaOpenAI
Our take

Grok 4.7 wins 2 of 4 categories, but GPT-6 Luna is 15.0× cheaper for everyday text work. Pick Grok 4.7 when quality matters most, GPT-6 Luna at volume.

Overall3537Best
Coding52Best48
Writing36Best31
Support3131
Value2642Best
Input / 1M$2.00$0.10Best
Output / 1M$6.00$0.50Best
Blended / 1M$3.00$0.20Best
Context window500K1.1MBest
Open weightsNoNo
Released21 Sept 202622 Sept 2026

Your monthly bill

50k
Grok 4.7$600
GPT-6 Luna$40.00Cheapest
List prices, a quarter of the tokens as output. Scores are provisional, from Arena and Epoch AI.