tokevenGemini 2.5 Pro 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
Gemini 2.5 Pro
Mid-tierGemini 3.1 Pro Custom Tools
Mid-tierQuality
Task confidence comparison
Guidance
When to use Gemini 2.5 Pro vs Gemini 3.1 Pro Custom Tools
Choose Gemini 2.5 Pro when...
- -Cost matters: 38% cheaper on input tokens
Choose Gemini 3.1 Pro Custom Tools when...
- Similar performance; consider provider preference or ecosystem fit.
At scale
Cost at scale
FAQ
When should I use Gemini 2.5 Pro instead of Gemini 3.1 Pro Custom Tools?
Gemini 2.5 Pro 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 Gemini 2.5 Pro?
Gemini 3.1 Pro Custom Tools input costs $2.00/MTok, which is 60% more than Gemini 2.5 Pro at $1.25/MTok.
What are the context window sizes for Gemini 2.5 Pro and Gemini 3.1 Pro Custom Tools?
Gemini 2.5 Pro has a 1,048.576K token context window. Gemini 3.1 Pro Custom Tools 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.
Gemini 2.5 Pro pricing & benchmarks
$1.25 / $10.00 per MTok
Gemini 2.5 Pro cost calculator
All Gemini models
Gemini 2.5 Pro pricing history
Gemini 3.1 Pro Custom Tools pricing & benchmarks
$2.00 / $12.00 per MTok
Gemini 3.1 Pro Custom Tools cost calculator
All Gemini models
Gemini 3.1 Pro Custom Tools pricing history
Other comparisons
How Gemini 2.5 Pro 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.