Start free
GeminivsGemini

Gemini 3.5 Flash 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 3.5 Flash

Fast / Budget

Gemini 3.1 Flash-Lite

Fast / Budget
Input $/MTok
$1.50
$0.25
Output $/MTok
$9.00
$1.50
Cache discount
90% off
90% off
Context
1,048.576K
1,048.576K

Quality

Task confidence comparison

Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
68
vs
0
Code Review
65
vs
0
Summarization
85
vs
0
Q&A
84
vs
0
Extraction
90
vs
0
Reasoning
60
vs
0
Classification
92
vs
0
Creative Writing
55
vs
0
Gemini 3.5 Flash
Gemini 3.1 Flash-Lite

Guidance

When to use Gemini 3.5 Flash vs Gemini 3.1 Flash-Lite

Choose Gemini 3.5 Flash when...

  • Similar performance; consider provider preference or ecosystem fit.

Choose Gemini 3.1 Flash-Lite when...

  • -Cost matters: 83% cheaper on input tokens

At scale

Cost at scale

Estimated cost assuming a seventy percent input and thirty percent output token split.
Gemini 3.5 Flash
Gemini 3.1 Flash-Lite
100K tokens
$0.38
$0.06Cheaper
1M tokens
$3.75
$0.63Cheaper
10M tokens
$37.50
$6.25Cheaper

FAQ

When should I use Gemini 3.5 Flash instead of Gemini 3.1 Flash-Lite?

Gemini 3.5 Flash 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 3.5 Flash?

Yes. Gemini 3.1 Flash-Lite input costs $0.25/MTok vs $1.50/MTok for Gemini 3.5 Flash, saving 83% on input.

What are the context window sizes for Gemini 3.5 Flash and Gemini 3.1 Flash-Lite?

Gemini 3.5 Flash 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.

Gemini 3.5 Flash pricing & benchmarks

$1.50 / $9.00 per MTok

Gemini 3.5 Flash cost calculator

All Gemini models

Gemini 3.5 Flash pricing history

Gemini 3.1 Flash-Lite pricing & benchmarks

$0.25 / $1.50 per MTok

Gemini 3.1 Flash-Lite cost calculator

All Gemini models

Gemini 3.1 Flash-Lite pricing history

Other comparisons

How Gemini 3.5 Flash and Gemini 3.1 Flash-Lite stack up against the rest of the field.

Gemini 3.5 Flash vs Claude Opus 4.8

Gemini 3.5 Flash vs Claude Sonnet 4.6

Gemini 3.5 Flash vs Claude Haiku 4.5

Gemini 3.1 Flash-Lite vs Claude Opus 4.8

Gemini 3.1 Flash-Lite vs Claude Sonnet 4.6

Gemini 3.1 Flash-Lite vs Claude Haiku 4.5

Track your real costs

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

Free spend teardownStart free dashboard