Family
Light
OpenAI
GPT-5.5 family
3 releases · Elo progression and succession lineage (D9)
Elo progression
Apr 2026
GPT-5.5
CLOSED
—
2680.9
Apr 2026
GPT-5.5 (High)
CLOSED
—
2563.6
Apr 2026
GPT-5.5 (xHigh)
CLOSED
—
2725.9