tokevenGPTvsGrok
GPT 5.6 Terra vs Grok 4.3
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 4.3
Mid-tierInput $/MTok
$2.00
$1.25
Output $/MTok
$12.00
$2.50
Cache discount
90% off
84% off
Context
922K
1M
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
64
vs
39
Code Review
84
vs
0
Summarization
64
vs
60
Q&A
92
vs
0
Extraction
75
vs
70
Reasoning
91
vs
71
Classification
89
vs
0
Creative Writing
67
vs
71
GPT 5.6 Terra
Grok 4.3
Guidance
When to use GPT 5.6 Terra vs Grok 4.3
Choose GPT 5.6 Terra when...
- -You need strong reasoning (confidence 91 vs 71)
- -You need strong extraction (confidence 75 vs 70)
- -You need strong code generation (confidence 64 vs 39)
- -You need strong summarization (confidence 64 vs 60)
Choose Grok 4.3 when...
- -You need strong creative writing (confidence 71 vs 67)
- -Cost matters: 38% cheaper on input tokens
- -You need a larger context window (1M vs 922K)
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
GPT 5.6 Terra
Grok 4.3
100K tokens
$0.50
$0.16Cheaper
1M tokens
$8.20
$3.25Cheaper
10M tokens
$82.00
$32.50Cheaper
FAQ
When should I use GPT 5.6 Terra instead of Grok 4.3?
GPT 5.6 Terra outperforms Grok 4.3 for Code Generation, Summarization, Extraction. It costs $2.00/$12.00 per million tokens (input/output).
Is Grok 4.3 cheaper than GPT 5.6 Terra?
Yes. Grok 4.3 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 Grok 4.3?
GPT 5.6 Terra has a 922K token context window. Grok 4.3 has a 1M 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 4.3 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.