Claude Fable 5.1 vs Claude Haiku 5.5

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

Higher intelligence
Claude Fable 5.1
Anthropic
53.4
Intelligence Index
View Claude Fable 5.1
Claude Haiku 5.5
Anthropic
43.4
Intelligence Index
View Claude Haiku 5.5

Capability profile

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

Head to head

Claude Fable 5.1
Claude Haiku 5.5
Intelligence
53.4
43.4
Coding
81.6
—
Math
—
—
Context window
1,000,000
1,000,000
Output price
$50/1M
$0.5/1M
Input price
$10/1M
$0.1/1M
Speed (t/s)
66
239
Knowledge cutoff
2026-06
2026-06
Open weights
No
No
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