tokevenGPTvsGPT
GPT 5.6 Terra vs GPT 3.5 Turbo
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 3.5 Turbo
Fast / BudgetInput $/MTok
$2.00
$0.50
Output $/MTok
$12.00
$1.50
Cache discount
90% off
0% off
Context
922K
16.385K
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 3.5 Turbo
Guidance
When to use GPT 5.6 Terra vs GPT 3.5 Turbo
Choose GPT 5.6 Terra when...
- -You need a larger context window (922K vs 16.385K)
- Similar performance; consider provider preference or ecosystem fit.
Choose GPT 3.5 Turbo when...
- -Cost matters: 75% 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 3.5 Turbo
100K tokens
$0.50
$0.08Cheaper
1M tokens
$8.20
$0.80Cheaper
10M tokens
$82.00
$8.00Cheaper
FAQ
When should I use GPT 5.6 Terra instead of GPT 3.5 Turbo?
GPT 5.6 Terra and GPT 3.5 Turbo perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is GPT 3.5 Turbo cheaper than GPT 5.6 Terra?
Yes. GPT 3.5 Turbo input costs $0.50/MTok vs $2.00/MTok for GPT 5.6 Terra, saving 75% on input.
What are the context window sizes for GPT 5.6 Terra and GPT 3.5 Turbo?
GPT 5.6 Terra has a 922K token context window. GPT 3.5 Turbo has a 16.385K 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 3.5 Turbo 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.