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GPT 5.6 Terra vs o4 Mini
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
GPT 5.6 Terra
Mid-tiero4 Mini
Fast / BudgetInput $/MTok
$2.00
$1.10
Output $/MTok
$12.00
$4.40
Cache discount
90% off
75% off
Context
922K
200K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
86
vs
0
Code Review
84
vs
0
Summarization
92
vs
0
Q&A
92
vs
0
Extraction
90
vs
0
Reasoning
82
vs
0
Classification
89
vs
0
Creative Writing
80
vs
0
GPT 5.6 Terra
o4 Mini
Guidance
When to use GPT 5.6 Terra vs o4 Mini
Choose GPT 5.6 Terra when...
- -You need a larger context window (922K vs 200K)
- Similar performance; consider provider preference or ecosystem fit.
Choose o4 Mini when...
- -Cost matters: 45% cheaper on input tokens
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
GPT 5.6 Terra
o4 Mini
100K tokens
$0.50
$0.21Cheaper
1M tokens
$8.20
$2.09Cheaper
10M tokens
$82.00
$20.90Cheaper
FAQ
When should I use GPT 5.6 Terra instead of o4 Mini?
GPT 5.6 Terra and o4 Mini perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is o4 Mini cheaper than GPT 5.6 Terra?
Yes. o4 Mini input costs $1.10/MTok vs $2.00/MTok for GPT 5.6 Terra, saving 45% on input.
What are the context window sizes for GPT 5.6 Terra and o4 Mini?
GPT 5.6 Terra has a 922K token context window. o4 Mini has a 200K 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 o4 Mini 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.