tokevenGPTvsGrok
o4 Mini vs Grok 4.20 Reasoning
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
o4 Mini
Fast / BudgetGrok 4.20 Reasoning
Mid-tierInput $/MTok
$1.10
$1.25
Output $/MTok
$4.40
$2.50
Cache discount
75% off
84% off
Context
200K
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
o4 Mini
Grok 4.20 Reasoning
Guidance
When to use o4 Mini vs Grok 4.20 Reasoning
Choose o4 Mini when...
- -Cost matters: 12% cheaper on input tokens
Choose Grok 4.20 Reasoning when...
- -You need a larger context window (1,000K vs 200K)
- 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.
o4 Mini
Grok 4.20 Reasoning
100K tokens
$0.21
$0.16Cheaper
1M tokens
$2.09Cheaper
$3.25
10M tokens
$20.90Cheaper
$32.50
FAQ
When should I use o4 Mini instead of Grok 4.20 Reasoning?
o4 Mini and Grok 4.20 Reasoning perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Grok 4.20 Reasoning cheaper than o4 Mini?
Grok 4.20 Reasoning input costs $1.25/MTok, which is 14% more than o4 Mini at $1.10/MTok.
What are the context window sizes for o4 Mini and Grok 4.20 Reasoning?
o4 Mini has a 200K token context window. Grok 4.20 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 o4 Mini and Grok 4.20 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.