GPT-6 Astra vs GPT-6 Luna
Which is the better AI model in 2026? Here's how they compare.
Domain intelligence profile
Artificial Analysis Intelligence Index by domain (0–100). Missing dimensions show as 0.
Head to head
GPT-6 Astra
GPT-6 Luna
Intelligence
56.9
27.9
Engineering
61.8
33.3
Legal
55.6
32.2
Finance
57.4
33.9
Healthcare
53.7
34.8
Economics
57.2
34.5
Strategy & Ops
58
43.2
Context window
1,050,000
1,050,000
Output price
$50/1M
$0.5/1M
Input price
$10/1M
$0.1/1M
Speed (t/s)
47
114
Knowledge cutoff
2026-04-30
2026-05-18
Open weights
No
No
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