Claude Sonnet 5.5 vs Grok Build 0.1

Which is the better AI model in 2026? Here's how they compare.

Claude Sonnet 5.5
Anthropic
56
Intelligence Index
View Claude Sonnet 5.5
Grok Build 0.1
xAI
—
Intelligence Index
View Grok Build 0.1

Capability profile

Artificial Analysis indices (0–100). Missing dimensions show as 0.

Head to head

Claude Sonnet 5.5
Grok Build 0.1
Intelligence
56
—
Coding
—
—
Math
—
—
Context window
1,000,000
256,000
Output price
$10/1M
$2/1M
Input price
$2/1M
$1/1M
Speed (t/s)
144
—
Knowledge cutoff
2026-06
—
Open weights
No
No
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