GLM-5.3 (Max) vs GPT-6 Luna (Max)

Which is better for the money: GLM-5.3 (Max) by Z AI or GPT-6 Luna (Max) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-24.

Trade-off

Z AIGLM-5.3 (Max)Off the frontier

Intelligence: 44.80
Total cost: $2503

OpenAIGPT-6 Luna (Max)On the frontier

Intelligence: 38.10
Total cost: $122

Verdict

Depends on your budget

GLM-5.3 (Max) scores 6.7 points higher (44.8 vs 38.1) but costs 21× as much to run the benchmark ($2503 vs $122; flagship vs mid-range cost classes). They are not alternatives at one budget: pick GLM-5.3 (Max) when you need intelligence above 38.1, and GPT-6 Luna (Max) when 38.1 is enough.

Metric	GLM-5.3 (Max)	GPT-6 Luna (Max)	Difference
Intelligence (higher is better)	44.8	38.1	−15.0% GPT-6 Luna (Max) is 15.0% less intelligent
Total AA cost (lower is better)	$2,503.48	$122.05	−95.1% GPT-6 Luna (Max) is 95.1% cheaper
End-to-end time (lower is better)	31.61s	82.02s	+159.5% GPT-6 Luna (Max) is 159.5% slower
Price per 1M tokens (in / out)	$1.40 / $4.40	$0.10 / $0.50
Input modalities	Text	Text, Image

GPT-6 Luna (Max) vs GLM-5.3 (Max): 15.0% less intelligence, 95.1% less cost to run the AA benchmark, and 159.5% slower end-to-end.

Open this matchup in the interactive picker GLM-5.3 (Max): what beats it GPT-6 Luna (Max): 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-6 Luna (Max) is on today's frontier: nothing is both smarter and cheaper.

GLM-5.3 (Max)GPT-6 Luna (Max)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-6-luna · Markdown: /api/v1/compare/glm-5-3/gpt-6-luna?format=md · llms.txt · agent skill