tokevenGPTvsGrok
GPT 5.1 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 5.1
Mid-tierGrok 4.20 Non-Reasoning
Mid-tierInput $/MTok
$1.25
$1.25
Output $/MTok
$10.00
$2.50
Cache discount
90% off
84% off
Context
272K
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 5.1
Grok 4.20 Non-Reasoning
Guidance
When to use GPT 5.1 vs Grok 4.20 Non-Reasoning
Choose GPT 5.1 when...
- Similar performance; consider provider preference or ecosystem fit.
Choose Grok 4.20 Non-Reasoning when...
- -You need a larger context window (1,000K vs 272K)
- 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 5.1
Grok 4.20 Non-Reasoning
100K tokens
$0.39
$0.16Cheaper
1M tokens
$3.88
$3.25Cheaper
10M tokens
$38.75
$32.50Cheaper
FAQ
When should I use GPT 5.1 instead of Grok 4.20 Non-Reasoning?
GPT 5.1 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 5.1?
Both models have the same input pricing at $1.25/MTok. Compare output pricing: $10.00 vs $2.50/MTok.
What are the context window sizes for GPT 5.1 and Grok 4.20 Non-Reasoning?
GPT 5.1 has a 272K 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 5.1 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.