Claude Fable 5.1 vs Grok 4.5
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 Fable 5.1
Grok 4.5
Intelligence
50
38.8
Coding
—
72.4
Math
—
—
Context window
1,000,000
500,000
Output price
$50/1M
$6/1M
Input price
$10/1M
$2/1M
Speed (t/s)
60
0
Knowledge cutoff
2026-06
—
Open weights
No
No
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