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GPTvsGemini

GPT 5.4 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

GPT 5.4 Pro

Flagship

Gemini 3.5 Flash-Lite

Fast / Budget
Input $/MTok
$30.00
$0.30
Output $/MTok
$180.00
$2.50
Cache discount
0% off
90% off
Context
1,050K
1,048.576K

Quality

Task confidence comparison

Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
0
vs
55
Code Review
0
vs
52
Summarization
0
vs
79
Q&A
0
vs
78
Extraction
0
vs
83
Reasoning
0
vs
50
Classification
0
vs
85
Creative Writing
0
vs
45
GPT 5.4 Pro
Gemini 3.5 Flash-Lite

Guidance

When to use GPT 5.4 Pro vs Gemini 3.5 Flash-Lite

Choose GPT 5.4 Pro when...

  • -You need a larger context window (1,050K vs 1,048.576K)
  • Similar performance; consider provider preference or ecosystem fit.

Choose Gemini 3.5 Flash-Lite when...

  • -Cost matters: 99% cheaper on input tokens

At scale

Cost at scale

Estimated cost assuming a seventy percent input and thirty percent output token split.
GPT 5.4 Pro
Gemini 3.5 Flash-Lite
100K tokens
$7.50
$0.10Cheaper
1M tokens
$123.00
$0.96Cheaper
10M tokens
$1230.00
$9.60Cheaper

FAQ

When should I use GPT 5.4 Pro instead of Gemini 3.5 Flash-Lite?

GPT 5.4 Pro and Gemini 3.5 Flash-Lite perform similarly across all tracked tasks. Pick based on pricing and provider preference.

Is Gemini 3.5 Flash-Lite cheaper than GPT 5.4 Pro?

Yes. Gemini 3.5 Flash-Lite input costs $0.30/MTok vs $30.00/MTok for GPT 5.4 Pro, saving 99% on input.

What are the context window sizes for GPT 5.4 Pro and Gemini 3.5 Flash-Lite?

GPT 5.4 Pro has a 1,050K token context window. Gemini 3.5 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.

GPT 5.4 Pro pricing & benchmarks

$30.00 / $180.00 per MTok

GPT 5.4 Pro cost calculator

All GPT models

GPT 5.4 Pro pricing history

Gemini 3.5 Flash-Lite pricing & benchmarks

$0.30 / $2.50 per MTok

Gemini 3.5 Flash-Lite cost calculator

All Gemini models

Gemini 3.5 Flash-Lite pricing history

Other comparisons

How GPT 5.4 Pro and Gemini 3.5 Flash-Lite stack up against the rest of the field.

GPT 5.4 Pro vs Claude Opus 4.8

GPT 5.4 Pro vs Claude Sonnet 4.6

GPT 5.4 Pro vs Claude Haiku 4.5

Gemini 3.5 Flash-Lite vs Claude Opus 4.8

Gemini 3.5 Flash-Lite vs Claude Sonnet 4.6

Gemini 3.5 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.

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