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
$2.50
$1.00
Output $/MTok
$15.00
$6.00
Cache discount
90% off
90% off
Context
1,000K
1,000K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
86
vs
70
Code Review
84
vs
68
Summarization
92
vs
84
Q&A
92
vs
85
Extraction
90
vs
89
Reasoning
82
vs
63
Classification
89
vs
91
Creative Writing
80
vs
58
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 summarization (confidence 92 vs 84)
- -You need strong q&a (confidence 92 vs 85)
- -You need strong extraction (confidence 90 vs 89)
- -You need strong code generation (confidence 86 vs 70)
Choose GPT 5.6 Luna when...
- -You need strong classification (confidence 91 vs 89)
- -Cost matters: 60% 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
$0.63
$0.25Cheaper
1M tokens
$6.25
$2.50Cheaper
10M tokens
$62.50
$25.00Cheaper
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 Summarization, Q&A, Extraction. It costs $2.50/$15.00 per million tokens (input/output).
Is GPT 5.6 Luna cheaper than GPT 5.6 Terra?
Yes. GPT 5.6 Luna input costs $1.00/MTok vs $2.50/MTok for GPT 5.6 Terra, saving 60% on input.
What are the context window sizes for GPT 5.6 Terra and GPT 5.6 Luna?
GPT 5.6 Terra has a 1,000K token context window. GPT 5.6 Luna 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.