tokevenGPTvsGPT
GPT 5.6 Sol vs GPT 4o
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
GPT 5.6 Sol
FlagshipGPT 4o
Mid-tierInput $/MTok
$4.00
$2.50
Output $/MTok
$20.00
$10.00
Cache discount
90% off
50% off
Context
922K
128K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
94
vs
0
Code Review
92
vs
0
Summarization
90
vs
0
Q&A
91
vs
0
Extraction
88
vs
0
Reasoning
96
vs
0
Classification
86
vs
0
Creative Writing
92
vs
0
GPT 5.6 Sol
GPT 4o
Guidance
When to use GPT 5.6 Sol vs GPT 4o
Choose GPT 5.6 Sol when...
- -You need a larger context window (922K vs 128K)
- Similar performance; consider provider preference or ecosystem fit.
Choose GPT 4o 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 Sol
GPT 4o
100K tokens
$0.88
$0.47Cheaper
1M tokens
$14.60
$4.75Cheaper
10M tokens
$146.00
$47.50Cheaper
FAQ
When should I use GPT 5.6 Sol instead of GPT 4o?
GPT 5.6 Sol and GPT 4o perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is GPT 4o cheaper than GPT 5.6 Sol?
Yes. GPT 4o input costs $2.50/MTok vs $4.00/MTok for GPT 5.6 Sol, saving 38% on input.
What are the context window sizes for GPT 5.6 Sol and GPT 4o?
GPT 5.6 Sol has a 922K token context window. GPT 4o has a 128K 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 Sol and GPT 4o 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.