tokevenGPTvsGPT
GPT 5.5 vs GPT 6 Astra
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
GPT 5.5
FlagshipGPT 6 Astra
FlagshipInput $/MTok
$5.00
$10.00
Output $/MTok
$30.00
$50.00
Cache discount
90% off
90% off
Context
1,050K
922K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
91
vs
0
Code Review
90
vs
0
Summarization
89
vs
0
Q&A
90
vs
0
Extraction
87
vs
0
Reasoning
95
vs
0
Classification
85
vs
0
Creative Writing
91
vs
0
GPT 5.5
GPT 6 Astra
Guidance
When to use GPT 5.5 vs GPT 6 Astra
Choose GPT 5.5 when...
- -Cost matters: 50% cheaper on input tokens
- -You need a larger context window (1,050K vs 922K)
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 5.5
GPT 6 Astra
100K tokens
$1.25Cheaper
$2.20
1M tokens
$20.50Cheaper
$36.50
10M tokens
$205.00Cheaper
$365.00
FAQ
When should I use GPT 5.5 instead of GPT 6 Astra?
GPT 5.5 and GPT 6 Astra perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is GPT 6 Astra cheaper than GPT 5.5?
GPT 6 Astra input costs $10.00/MTok, which is 100% more than GPT 5.5 at $5.00/MTok.
What are the context window sizes for GPT 5.5 and GPT 6 Astra?
GPT 5.5 has a 1,050K 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 5.5 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.