tokevenGPTvsGemini
GPT 5.6 Terra vs Gemini 3.5 Flash
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
GPT 5.6 Terra
Mid-tierGemini 3.5 Flash
Fast / BudgetInput $/MTok
$2.00
$1.50
Output $/MTok
$12.00
$9.00
Cache discount
90% off
90% off
Context
922K
1.0M
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
64
vs
61
Code Review
84
vs
65
Summarization
64
vs
76
Q&A
92
vs
84
Extraction
75
vs
73
Reasoning
91
vs
82
Classification
89
vs
92
Creative Writing
67
vs
75
GPT 5.6 Terra
Gemini 3.5 Flash
Guidance
When to use GPT 5.6 Terra vs Gemini 3.5 Flash
Choose GPT 5.6 Terra when...
- -You need strong q&a (confidence 92 vs 84)
- -You need strong reasoning (confidence 91 vs 82)
- -You need strong code review (confidence 84 vs 65)
- -You need strong extraction (confidence 75 vs 73)
Choose Gemini 3.5 Flash when...
- -You need strong classification (confidence 92 vs 89)
- -You need strong summarization (confidence 76 vs 64)
- -You need strong creative writing (confidence 75 vs 67)
- -Cost matters: 25% cheaper on input tokens
- -You need a larger context window (1.0M vs 922K)
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
GPT 5.6 Terra
Gemini 3.5 Flash
100K tokens
$0.50
$0.38Cheaper
1M tokens
$8.20
$3.75Cheaper
10M tokens
$82.00
$37.50Cheaper
FAQ
When should I use GPT 5.6 Terra instead of Gemini 3.5 Flash?
GPT 5.6 Terra outperforms Gemini 3.5 Flash for Code Generation, Code Review, Q&A. It costs $2.00/$12.00 per million tokens (input/output).
Is Gemini 3.5 Flash cheaper than GPT 5.6 Terra?
Yes. Gemini 3.5 Flash input costs $1.50/MTok vs $2.00/MTok for GPT 5.6 Terra, saving 25% on input.
What are the context window sizes for GPT 5.6 Terra and Gemini 3.5 Flash?
GPT 5.6 Terra has a 922K token context window. Gemini 3.5 Flash 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 GPT 5.6 Terra and Gemini 3.5 Flash 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.