GLM-5.3 (Max) vs GPT-5.5 (Xhigh)

Which is better for the money: GLM-5.3 (Max) by Z AI or GPT-5.5 (Xhigh) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-24.

Clear winner

Z AIGLM-5.3 (Max)Off the frontier

Intelligence: 44.80
Total cost: $2503

OpenAIGPT-5.5 (Xhigh)Off the frontier

Intelligence: 38.40
Total cost: $5294

Verdict

Pick GLM-5.3 (Max)

GPT-5.5 (Xhigh) vs GLM-5.3 (Max): 14.3% less intelligence, 111.5% more cost to run the AA benchmark, and 42.2% slower end-to-end.

Metric	GLM-5.3 (Max)	GPT-5.5 (Xhigh)	Difference
Intelligence (higher is better)	44.8	38.4	−14.3% GPT-5.5 (Xhigh) is 14.3% less intelligent
Total AA cost (lower is better)	$2,503.48	$5,294.36	+111.5% GPT-5.5 (Xhigh) is 2.1× more expensive
End-to-end time (lower is better)	31.61s	44.96s	+42.2% GPT-5.5 (Xhigh) is 42.2% slower
Price per 1M tokens (in / out)	$1.40 / $4.40	$5.00 / $30.0
Input modalities	Text	Text, Image

Open this matchup in the interactive picker GLM-5.3 (Max): what beats it GPT-5.5 (Xhigh): what beats it

Today's Pareto frontier

Against the frontier

GLM-5.3 (Max) is off the frontier: at the same or lower cost, Claude Opus 5.5 (High, Default Fallback) scores 53.60 for $2172.
GPT-5.5 (Xhigh) is off the frontier: at the same or lower cost, Claude Opus 5.5 (Xhigh, Default Fallback) scores 56.00 for $4057.

GLM-5.3 (Max)GPT-5.5 (Xhigh)Today's Pareto frontierOpen-weights frontierEvery other model

Matchup

Compare something else

Agents: Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/glm-5-3/gpt-5-5 · Markdown: /api/v1/compare/glm-5-3/gpt-5-5?format=md · llms.txt · agent skill