GPTvsGemini

GPT 5.6 Sol 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 5.6 Sol

Flagship

Gemini 3.1 Pro Custom Tools

Mid-tier
Input $/MTok
$4.00
$2.00
Output $/MTok
$20.00
$12.00
Cache discount
90% off
90% off
Context
922K
1,048.576K

Quality

Task confidence comparison

Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
94
vs
0
Code Review
92
vs
0
Summarization
90
vs
0
Q&A
91
vs
0
Extraction
88
vs
0
Reasoning
96
vs
0
Classification
86
vs
0
Creative Writing
92
vs
0
GPT 5.6 Sol
Gemini 3.1 Pro Custom Tools

Guidance

When to use GPT 5.6 Sol vs Gemini 3.1 Pro Custom Tools

Choose GPT 5.6 Sol when...

  • Similar performance; consider provider preference or ecosystem fit.

Choose Gemini 3.1 Pro Custom Tools when...

  • -Cost matters: 50% cheaper on input tokens
  • -You need a larger context window (1,048.576K vs 922K)

At scale

Cost at scale

Estimated cost assuming a seventy percent input and thirty percent output token split.
GPT 5.6 Sol
Gemini 3.1 Pro Custom Tools
100K tokens
$0.88
$0.50Cheaper
1M tokens
$14.60
$8.20Cheaper
10M tokens
$146.00
$82.00Cheaper

FAQ

When should I use GPT 5.6 Sol instead of Gemini 3.1 Pro Custom Tools?

GPT 5.6 Sol 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 5.6 Sol?

Yes. Gemini 3.1 Pro Custom Tools input costs $2.00/MTok vs $4.00/MTok for GPT 5.6 Sol, saving 50% on input.

What are the context window sizes for GPT 5.6 Sol and Gemini 3.1 Pro Custom Tools?

GPT 5.6 Sol has a 922K token context window. Gemini 3.1 Pro Custom Tools has a 1,048.576K token context window.

Track your real costs

Comparisons show estimated costs at list price. The dashboard reveals your real spend and savings.