tokevenGrokvsGrok
Grok Build 0.1 vs Grok 4.20 Reasoning
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Grok Build 0.1
Fast / BudgetGrok 4.20 Reasoning
Mid-tierInput $/MTok
$1.00
$1.25
Output $/MTok
$2.00
$2.50
Cache discount
80% off
84% off
Context
256K
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
Grok Build 0.1
Grok 4.20 Reasoning
Guidance
When to use Grok Build 0.1 vs Grok 4.20 Reasoning
Choose Grok Build 0.1 when...
- -Cost matters: 20% cheaper on input tokens
Choose Grok 4.20 Reasoning when...
- -You need a larger context window (1,000K vs 256K)
- 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.
Grok Build 0.1
Grok 4.20 Reasoning
100K tokens
$0.13Cheaper
$0.16
1M tokens
$2.60Cheaper
$3.25
10M tokens
$26.00Cheaper
$32.50
FAQ
When should I use Grok Build 0.1 instead of Grok 4.20 Reasoning?
Grok Build 0.1 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 Grok Build 0.1?
Grok 4.20 Reasoning input costs $1.25/MTok, which is 25% more than Grok Build 0.1 at $1.00/MTok.
What are the context window sizes for Grok Build 0.1 and Grok 4.20 Reasoning?
Grok Build 0.1 has a 256K 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 Grok Build 0.1 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.