GPT-5.6 Sol vs GPT-6.1 Sol

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

GPT-5.6 Sol
OpenAI
47
Intelligence Index
View GPT-5.6 Sol
Higher intelligence
GPT-6.1 Sol
OpenAI
51.8
Intelligence Index
View GPT-6.1 Sol

Capability profile

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

Head to head

GPT-5.6 Sol
GPT-6.1 Sol
Intelligence
47
51.8
Coding
77.4
—
Math
—
—
Context window
1,050,000
1,050,000
Output price
$20/1M
$10/1M
Input price
$4/1M
$2/1M
Speed (t/s)
0
57
Knowledge cutoff
2026-02-16
2026-04-30
Open weights
No
No
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