tokevenGeminivsGemini
Gemini 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 / BudgetInput $/MTok
$2.00
$0.25
Output $/MTok
$12.00
$1.50
Cache discount
75% off
75% off
Context
1,000K
1,000K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
86
vs
55
Code Review
84
vs
52
Summarization
87
vs
79
Q&A
87
vs
78
Extraction
85
vs
83
Reasoning
90
vs
50
Classification
86
vs
85
Creative Writing
84
vs
45
Gemini 3.1 Pro
Gemini 3.5 Flash-Lite
Guidance
When to use Gemini 3.1 Pro vs Gemini 3.5 Flash-Lite
Choose Gemini 3.1 Pro when...
- -You need strong reasoning (confidence 90 vs 50)
- -You need strong summarization (confidence 87 vs 79)
- -You need strong q&a (confidence 87 vs 78)
- -You need strong code generation (confidence 86 vs 55)
Choose Gemini 3.5 Flash-Lite when...
- -Cost matters: 88% cheaper on input tokens
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
Gemini 3.1 Pro
Gemini 3.5 Flash-Lite
100K tokens
$0.50
$0.06Cheaper
1M tokens
$5.00
$0.63Cheaper
10M tokens
$50.00
$6.25Cheaper
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 Reasoning, Code Generation, Code Review. 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 $0.25/MTok vs $2.00/MTok for Gemini 3.1 Pro, saving 88% 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 1,000K token context window. Gemini 3.5 Flash-Lite has a 1,000K token context window.
Track your real costs
Comparisons show estimated costs at list price. The dashboard reveals your real spend and savings.