Claude Opus 5 vs Claude Opus 5.5
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
Claude Opus 5
Claude Opus 5.5
Intelligence
44.2
59.1
Engineering
51.3
65.3
Legal
50.9
58
Finance
49.7
59.4
Healthcare
47.1
57.9
Economics
50.4
60.3
Strategy & Ops
53.7
61.4
Context window
1,000,000
1,000,000
Output price
$25/1M
$20/1M
Input price
$5/1M
$4/1M
Speed (t/s)
50
95
Knowledge cutoff
2026-05
2026-06
Open weights
No
No
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