tokevenGPTvsGPT
GPT 5.6 Terra vs GPT 4
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 4
FlagshipInput $/MTok
$2.00
$30.00
Output $/MTok
$12.00
$60.00
Cache discount
90% off
0% off
Context
922K
8K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
64
vs
0
Code Review
84
vs
0
Summarization
64
vs
0
Q&A
92
vs
0
Extraction
75
vs
0
Reasoning
91
vs
0
Classification
89
vs
0
Creative Writing
67
vs
0
GPT 5.6 Terra
GPT 4
Guidance
When to use GPT 5.6 Terra vs GPT 4
Choose GPT 5.6 Terra when...
- -Cost matters: 93% cheaper on input tokens
- -You need a larger context window (922K vs 8K)
Choose GPT 4 when...
- Similar performance; consider provider preference or ecosystem fit.
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
GPT 5.6 Terra
GPT 4
100K tokens
$0.50Cheaper
$3.90
1M tokens
$8.20Cheaper
$39.00
10M tokens
$82.00Cheaper
$390.00
FAQ
When should I use GPT 5.6 Terra instead of GPT 4?
GPT 5.6 Terra and GPT 4 perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is GPT 4 cheaper than GPT 5.6 Terra?
GPT 4 input costs $30.00/MTok, which is 1400% more than GPT 5.6 Terra at $2.00/MTok.
What are the context window sizes for GPT 5.6 Terra and GPT 4?
GPT 5.6 Terra has a 922K token context window. GPT 4 has a 8K 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 4 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.