tokevenGPTvsGrok
GPT 5.6 Terra vs Grok 4.5
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
GPT 5.6 Terra
Mid-tierGrok 4.5
FlagshipInput $/MTok
$2.00
$2.00
Output $/MTok
$12.00
$6.00
Cache discount
90% off
85% off
Context
1,050K
500K
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
Grok 4.5
Guidance
When to use GPT 5.6 Terra vs Grok 4.5
Choose GPT 5.6 Terra when...
- -You need a larger context window (1,050K vs 500K)
- Similar performance; consider provider preference or ecosystem fit.
Choose Grok 4.5 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
Grok 4.5
100K tokens
$0.50
$0.32Cheaper
1M tokens
$8.20
$6.40Cheaper
10M tokens
$82.00
$64.00Cheaper
FAQ
When should I use GPT 5.6 Terra instead of Grok 4.5?
GPT 5.6 Terra and Grok 4.5 perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Grok 4.5 cheaper than GPT 5.6 Terra?
Both models have the same input pricing at $2.00/MTok. Compare output pricing: $12.00 vs $6.00/MTok.
What are the context window sizes for GPT 5.6 Terra and Grok 4.5?
GPT 5.6 Terra has a 1,050K token context window. Grok 4.5 has a 500K 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 Grok 4.5 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.