tokevenGPTvsGemini
GPT 4 vs Gemini 3.1 Pro Custom Tools
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
GPT 4
FlagshipGemini 3.1 Pro Custom Tools
Mid-tierInput $/MTok
$30.00
$2.00
Output $/MTok
$60.00
$12.00
Cache discount
0% off
90% off
Context
8K
1.0M
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
0
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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 4
Gemini 3.1 Pro Custom Tools
Guidance
When to use GPT 4 vs Gemini 3.1 Pro Custom Tools
Choose GPT 4 when...
- Similar performance; consider provider preference or ecosystem fit.
Choose Gemini 3.1 Pro Custom Tools when...
- -Cost matters: 93% cheaper on input tokens
- -You need a larger context window (1.0M vs 8K)
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
GPT 4
Gemini 3.1 Pro Custom Tools
100K tokens
$3.90
$0.50Cheaper
1M tokens
$39.00
$8.20Cheaper
10M tokens
$390.00
$82.00Cheaper
FAQ
When should I use GPT 4 instead of Gemini 3.1 Pro Custom Tools?
GPT 4 and Gemini 3.1 Pro Custom Tools perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Gemini 3.1 Pro Custom Tools cheaper than GPT 4?
Yes. Gemini 3.1 Pro Custom Tools input costs $2.00/MTok vs $30.00/MTok for GPT 4, saving 93% on input.
What are the context window sizes for GPT 4 and Gemini 3.1 Pro Custom Tools?
GPT 4 has a 8K token context window. Gemini 3.1 Pro Custom Tools has a 1.0M 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 4 and Gemini 3.1 Pro Custom Tools 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.