Claude Haiku 5.5 vs GPT-5.6 Terra

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

Higher intelligence
Claude Haiku 5.5
Anthropic
43.4
Intelligence Index
View Claude Haiku 5.5
GPT-5.6 Terra
OpenAI
42.1
Intelligence Index
View GPT-5.6 Terra

Capability profile

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

Head to head

Claude Haiku 5.5
GPT-5.6 Terra
Intelligence
43.4
42.1
Coding
—
76.7
Math
—
—
Context window
1,000,000
1,050,000
Output price
$0.5/1M
$12/1M
Input price
$0.1/1M
$2/1M
Speed (t/s)
239
108
Knowledge cutoff
2026-06
2026-02-16
Open weights
No
No
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