tokevenGPT 5.6 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 5.6 Luna
Fast / BudgetGrok 4.20 Non-Reasoning
Mid-tierQuality
Task confidence comparison
Guidance
When to use GPT 5.6 Luna vs Grok 4.20 Non-Reasoning
Choose GPT 5.6 Luna when...
- -Cost matters: 84% 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
FAQ
When should I use GPT 5.6 Luna instead of Grok 4.20 Non-Reasoning?
GPT 5.6 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 5.6 Luna?
Grok 4.20 Non-Reasoning input costs $1.25/MTok, which is 525% more than GPT 5.6 Luna at $0.20/MTok.
What are the context window sizes for GPT 5.6 Luna and Grok 4.20 Non-Reasoning?
GPT 5.6 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 5.6 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.