tokevenGPTvsGrok
GPT 6 Luna vs Grok 4.20 Non-Reasoning
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
GPT 6 Luna
Fast / BudgetGrok 4.20 Non-Reasoning
Mid-tierInput $/MTok
$0.10
$1.25
Output $/MTok
$0.50
$2.50
Cache discount
90% off
84% off
Context
922K
1,000K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
0
vs
0
Code Review
0
vs
0
Summarization
0
vs
0
Q&A
0
vs
0
Extraction
0
vs
0
Reasoning
0
vs
0
Classification
0
vs
0
Creative Writing
0
vs
0
GPT 6 Luna
Grok 4.20 Non-Reasoning
Guidance
When to use GPT 6 Luna vs Grok 4.20 Non-Reasoning
Choose GPT 6 Luna when...
- -Cost matters: 92% cheaper on input tokens
Choose Grok 4.20 Non-Reasoning when...
- -You need a larger context window (1,000K vs 922K)
- Similar performance; consider provider preference or ecosystem fit.
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
GPT 6 Luna
Grok 4.20 Non-Reasoning
100K tokens
$0.02Cheaper
$0.16
1M tokens
$0.36Cheaper
$3.25
10M tokens
$3.65Cheaper
$32.50
FAQ
When should I use GPT 6 Luna instead of Grok 4.20 Non-Reasoning?
GPT 6 Luna and Grok 4.20 Non-Reasoning perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Grok 4.20 Non-Reasoning cheaper than GPT 6 Luna?
Grok 4.20 Non-Reasoning input costs $1.25/MTok, which is 1150% more than GPT 6 Luna at $0.10/MTok.
What are the context window sizes for GPT 6 Luna and Grok 4.20 Non-Reasoning?
GPT 6 Luna has a 922K token context window. Grok 4.20 Non-Reasoning has a 1,000K token context window.
Go deeper on either model
Per-call cost calculators, provider lineups, and price history for both models on this page.
Other comparisons
How GPT 6 Luna and Grok 4.20 Non-Reasoning stack up against the rest of the field.
Track your real costs
Comparisons show estimated costs at list price. The dashboard reveals your real spend and savings.