tokevenGPTvsGemini
GPT 5.5 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 5.5
FlagshipGemini 3.5 Flash-Lite
Fast / BudgetInput $/MTok
$5.00
$0.25
Output $/MTok
$30.00
$1.50
Cache discount
90% off
75% off
Context
128K
1,000K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
91
vs
55
Code Review
90
vs
52
Summarization
89
vs
79
Q&A
90
vs
78
Extraction
87
vs
83
Reasoning
95
vs
50
Classification
85
vs
85
Creative Writing
91
vs
45
GPT 5.5
Gemini 3.5 Flash-Lite
Guidance
When to use GPT 5.5 vs Gemini 3.5 Flash-Lite
Choose GPT 5.5 when...
- -You need strong reasoning (confidence 95 vs 50)
- -You need strong code generation (confidence 91 vs 55)
- -You need strong creative writing (confidence 91 vs 45)
- -You need strong code review (confidence 90 vs 52)
Choose Gemini 3.5 Flash-Lite when...
- -Cost matters: 95% cheaper on input tokens
- -You need a larger context window (1,000K vs 128K)
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
GPT 5.5
Gemini 3.5 Flash-Lite
100K tokens
$1.25
$0.06Cheaper
1M tokens
$12.50
$0.63Cheaper
10M tokens
$125.00
$6.25Cheaper
FAQ
When should I use GPT 5.5 instead of Gemini 3.5 Flash-Lite?
GPT 5.5 outperforms Gemini 3.5 Flash-Lite for Reasoning, Code Generation, Code Review. It costs $5.00/$30.00 per million tokens (input/output).
Is Gemini 3.5 Flash-Lite cheaper than GPT 5.5?
Yes. Gemini 3.5 Flash-Lite input costs $0.25/MTok vs $5.00/MTok for GPT 5.5, saving 95% on input.
What are the context window sizes for GPT 5.5 and Gemini 3.5 Flash-Lite?
GPT 5.5 has a 128K 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.