tokevenGemini 3.1 Pro vs Gemini 3.5 Flash-Lite
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Gemini 3.1 Pro
Mid-tierGemini 3.5 Flash-Lite
Fast / BudgetQuality
Task confidence comparison
Guidance
When to use Gemini 3.1 Pro vs Gemini 3.5 Flash-Lite
Choose Gemini 3.1 Pro when...
- -You need strong q&a (confidence 87 vs 78)
- -You need strong classification (confidence 86 vs 85)
- -You need strong code review (confidence 84 vs 52)
- -You need strong reasoning (confidence 84 vs 60)
Choose Gemini 3.5 Flash-Lite when...
- -You need strong code generation (confidence 58 vs 57)
- -Cost matters: 85% cheaper on input tokens
At scale
Cost at scale
FAQ
When should I use Gemini 3.1 Pro instead of Gemini 3.5 Flash-Lite?
Gemini 3.1 Pro outperforms Gemini 3.5 Flash-Lite for Code Review, Summarization, Q&A. It costs $2.00/$12.00 per million tokens (input/output).
Is Gemini 3.5 Flash-Lite cheaper than Gemini 3.1 Pro?
Yes. Gemini 3.5 Flash-Lite input costs $0.30/MTok vs $2.00/MTok for Gemini 3.1 Pro, saving 85% on input.
What are the context window sizes for Gemini 3.1 Pro and Gemini 3.5 Flash-Lite?
Gemini 3.1 Pro has a 1.0M token context window. Gemini 3.5 Flash-Lite 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 Gemini 3.1 Pro and Gemini 3.5 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.