OpenAI·GPT

GPT-5.5 High

5.5 High

Aliases: gpt-5.5-high, gpt-5.5-xhigh

Canonical ID

openai-gpt-5.5-high

Independent sources

Composite eligibility

Eligible

Public benchmark scores

Source ranks stay intact; incompatible raw scores are not added.

StaleHigh confidence

LMArena / Chatbot ArenaText leaderboard · Aug 12, 2026Updated: 8/12/2026

Elo 1482

#17 · 96th percentile

FreshHigh confidence

LiveBenchLiveBench 2026-06-25 · ReasoningUpdated: 6/25/2026

89.7 / 100

#8 · 83th percentile

This model has scores from 2 independent sources and is eligible for the ToolCenter composite reference.

Historical snapshots are available on the source score cards.