tokevenGPTvsGPT
GPT 5.6 Terra vs GPT 5.6 Luna
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
GPT 5.6 Terra
Mid-tierGPT 5.6 Luna
Fast / BudgetInput $/MTok
$2.00
$0.20
Output $/MTok
$12.00
$1.20
Cache discount
90% off
90% off
Context
922K
922K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
64
vs
62
Code Review
84
vs
68
Summarization
64
vs
57
Q&A
92
vs
85
Extraction
75
vs
74
Reasoning
91
vs
86
Classification
89
vs
91
Creative Writing
67
vs
69
GPT 5.6 Terra
GPT 5.6 Luna
Guidance
When to use GPT 5.6 Terra vs GPT 5.6 Luna
Choose GPT 5.6 Terra when...
- -You need strong q&a (confidence 92 vs 85)
- -You need strong reasoning (confidence 91 vs 86)
- -You need strong code review (confidence 84 vs 68)
- -You need strong extraction (confidence 75 vs 74)
Choose GPT 5.6 Luna when...
- -You need strong classification (confidence 91 vs 89)
- -You need strong creative writing (confidence 69 vs 67)
- -Cost matters: 90% 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
GPT 5.6 Luna
100K tokens
$0.50
$0.05Cheaper
1M tokens
$8.20
$0.82Cheaper
10M tokens
$82.00
$8.20Cheaper
FAQ
When should I use GPT 5.6 Terra instead of GPT 5.6 Luna?
GPT 5.6 Terra outperforms GPT 5.6 Luna for Code Generation, Code Review, Summarization. It costs $2.00/$12.00 per million tokens (input/output).
Is GPT 5.6 Luna cheaper than GPT 5.6 Terra?
Yes. GPT 5.6 Luna input costs $0.20/MTok vs $2.00/MTok for GPT 5.6 Terra, saving 90% on input.
What are the context window sizes for GPT 5.6 Terra and GPT 5.6 Luna?
GPT 5.6 Terra has a 922K token context window. GPT 5.6 Luna has a 922K 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 GPT 5.6 Luna 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.