tokevenGPTvsGPT
GPT 5.6 Sol vs GPT 6 Astra
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
GPT 5.6 Sol
FlagshipGPT 6 Astra
FlagshipInput $/MTok
$4.00
$10.00
Output $/MTok
$20.00
$50.00
Cache discount
90% off
90% off
Context
922K
922K
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 6 Astra
Guidance
When to use GPT 5.6 Sol vs GPT 6 Astra
Choose GPT 5.6 Sol when...
- -Cost matters: 60% cheaper on input tokens
Choose GPT 6 Astra 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 Sol
GPT 6 Astra
100K tokens
$0.88Cheaper
$2.20
1M tokens
$14.60Cheaper
$36.50
10M tokens
$146.00Cheaper
$365.00
FAQ
When should I use GPT 5.6 Sol instead of GPT 6 Astra?
GPT 5.6 Sol and GPT 6 Astra perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is GPT 6 Astra cheaper than GPT 5.6 Sol?
GPT 6 Astra input costs $10.00/MTok, which is 150% more than GPT 5.6 Sol at $4.00/MTok.
What are the context window sizes for GPT 5.6 Sol and GPT 6 Astra?
GPT 5.6 Sol has a 922K token context window. GPT 6 Astra has a 922K 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 6 Astra 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.