tokevenGPTvsGemini
o3 Mini vs Gemini 3.1 Pro
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
o3 Mini
Fast / BudgetGemini 3.1 Pro
Mid-tierInput $/MTok
$1.10
$2.00
Output $/MTok
$4.40
$12.00
Cache discount
50% off
90% off
Context
200K
1,048.576K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
0
vs
86
Code Review
0
vs
84
Summarization
0
vs
87
Q&A
0
vs
87
Extraction
0
vs
85
Reasoning
0
vs
90
Classification
0
vs
86
Creative Writing
0
vs
84
o3 Mini
Gemini 3.1 Pro
Guidance
When to use o3 Mini vs Gemini 3.1 Pro
Choose o3 Mini when...
- -Cost matters: 45% cheaper on input tokens
Choose Gemini 3.1 Pro when...
- -You need a larger context window (1,048.576K 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.
o3 Mini
Gemini 3.1 Pro
100K tokens
$0.21Cheaper
$0.50
1M tokens
$2.09Cheaper
$8.20
10M tokens
$20.90Cheaper
$82.00
FAQ
When should I use o3 Mini instead of Gemini 3.1 Pro?
o3 Mini and Gemini 3.1 Pro perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Gemini 3.1 Pro cheaper than o3 Mini?
Gemini 3.1 Pro input costs $2.00/MTok, which is 82% more than o3 Mini at $1.10/MTok.
What are the context window sizes for o3 Mini and Gemini 3.1 Pro?
o3 Mini has a 200K token context window. Gemini 3.1 Pro has a 1,048.576K 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 o3 Mini and Gemini 3.1 Pro 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.