tokevenGeminivsGrok
Gemini 3.1 Pro vs Grok 4.5
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Gemini 3.1 Pro
Mid-tierGrok 4.5
FlagshipInput $/MTok
$2.00
$2.00
Output $/MTok
$12.00
$6.00
Cache discount
90% off
85% off
Context
1,000K
500K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
86
vs
0
Code Review
84
vs
0
Summarization
87
vs
0
Q&A
87
vs
0
Extraction
85
vs
0
Reasoning
90
vs
0
Classification
86
vs
0
Creative Writing
84
vs
0
Gemini 3.1 Pro
Grok 4.5
Guidance
When to use Gemini 3.1 Pro vs Grok 4.5
Choose Gemini 3.1 Pro when...
- -You need a larger context window (1,000K vs 500K)
- Similar performance; consider provider preference or ecosystem fit.
Choose Grok 4.5 when...
- 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.
Gemini 3.1 Pro
Grok 4.5
100K tokens
$0.50
$0.32Cheaper
1M tokens
$8.20
$6.40Cheaper
10M tokens
$82.00
$64.00Cheaper
FAQ
When should I use Gemini 3.1 Pro instead of Grok 4.5?
Gemini 3.1 Pro and Grok 4.5 perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Grok 4.5 cheaper than Gemini 3.1 Pro?
Both models have the same input pricing at $2.00/MTok. Compare output pricing: $12.00 vs $6.00/MTok.
What are the context window sizes for Gemini 3.1 Pro and Grok 4.5?
Gemini 3.1 Pro has a 1,000K token context window. Grok 4.5 has a 500K 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 Gemini 3.1 Pro and Grok 4.5 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.