tokevenGemini 2.5 Pro vs Gemini 3.1 Flash-Lite
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 Flash-Lite
Fast / BudgetQuality
Task confidence comparison
Guidance
When to use Gemini 2.5 Pro vs Gemini 3.1 Flash-Lite
Choose Gemini 2.5 Pro when...
- Similar performance; consider provider preference or ecosystem fit.
Choose Gemini 3.1 Flash-Lite when...
- -Cost matters: 80% cheaper on input tokens
At scale
Cost at scale
FAQ
When should I use Gemini 2.5 Pro instead of Gemini 3.1 Flash-Lite?
Gemini 2.5 Pro and Gemini 3.1 Flash-Lite perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Gemini 3.1 Flash-Lite cheaper than Gemini 2.5 Pro?
Yes. Gemini 3.1 Flash-Lite input costs $0.25/MTok vs $1.25/MTok for Gemini 2.5 Pro, saving 80% on input.
What are the context window sizes for Gemini 2.5 Pro and Gemini 3.1 Flash-Lite?
Gemini 2.5 Pro has a 1,048.576K token context window. Gemini 3.1 Flash-Lite 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 Gemini 2.5 Pro and Gemini 3.1 Flash-Lite 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.