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GPT 5.6 Terra vs GPT 5
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
Mid-tierInput $/MTok
$2.00
$1.25
Output $/MTok
$12.00
$10.00
Cache discount
90% off
90% off
Context
922K
272K
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
GPT 5
Guidance
When to use GPT 5.6 Terra vs GPT 5
Choose GPT 5.6 Terra when...
- -You need a larger context window (922K vs 272K)
- Similar performance; consider provider preference or ecosystem fit.
Choose GPT 5 when...
- -Cost matters: 38% 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
100K tokens
$0.50
$0.39Cheaper
1M tokens
$8.20
$3.88Cheaper
10M tokens
$82.00
$38.75Cheaper
FAQ
When should I use GPT 5.6 Terra instead of GPT 5?
GPT 5.6 Terra and GPT 5 perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is GPT 5 cheaper than GPT 5.6 Terra?
Yes. GPT 5 input costs $1.25/MTok vs $2.00/MTok for GPT 5.6 Terra, saving 38% on input.
What are the context window sizes for GPT 5.6 Terra and GPT 5?
GPT 5.6 Terra has a 922K token context window. GPT 5 has a 272K 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 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.