Claude Opus 5.5 vs GLM-5.3
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 5.5
GLM-5.3
Intelligence
59.1
31.7
Engineering
65.3
37.6
Legal
58
35.8
Finance
59.4
42.1
Healthcare
57.9
39.3
Economics
60.3
37.3
Strategy & Ops
61.4
47.4
Context window
1,000,000
1,048,576
Output price
$20/1M
$4.4/1M
Input price
$4/1M
$1.4/1M
Speed (t/s)
95
73
Knowledge cutoff
2026-06
—
Open weights
No
Yes
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