Claude Opus 5.5 vs GLM-5.3
Which is the better AI model in 2026? Here's how they compare.
Capability profile
Artificial Analysis indices (0–100). Missing dimensions show as 0.
Head to head
Claude Opus 5.5
GLM-5.3
Intelligence
57.6
—
Coding
—
—
Math
—
—
Context window
1,000,000
1,000,000
Output price
$20/1M
$4.4/1M
Input price
$4/1M
$1.4/1M
Speed (t/s)
0
—
Knowledge cutoff
2026-06
—
Open weights
No
Yes
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