GLM-5.1 (Reasoning) vs GPT-5.6 Sol (Low)

Which is better for the money: GLM-5.1 (Reasoning) by Z AI or GPT-5.6 Sol (Low) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.

Clear winner

Z AIGLM-5.1 (Reasoning)Off the frontier

Intelligence: 26.10
Total cost: $1487

OpenAIGPT-5.6 Sol (Low)Off the frontier

Intelligence: 33.50
Total cost: $637

Verdict

Pick GPT-5.6 Sol (Low)

GPT-5.6 Sol (Low) vs GLM-5.1 (Reasoning): 28.4% more intelligence, 57.1% less cost to run the AA benchmark, and 86.6% faster end-to-end.

Metric	GLM-5.1 (Reasoning)	GPT-5.6 Sol (Low)	Difference
Intelligence (higher is better)	26.1	33.5	+28.4% GPT-5.6 Sol (Low) is 28.4% more intelligent
Total AA cost (lower is better)	$1,486.78	$637.28	−57.1% GPT-5.6 Sol (Low) is 57.1% cheaper
End-to-end time (lower is better)	61.77s	8.26s	−86.6% GPT-5.6 Sol (Low) is 86.6% faster
Price per 1M tokens (in / out)	$1.28 / $4.07	$4.00 / $20.0
Input modalities	Text	Text, Image

Open this matchup in the interactive picker GLM-5.1 (Reasoning): what beats it GPT-5.6 Sol (Low): what beats it

Today's Pareto frontier

Against the frontier

GLM-5.1 (Reasoning) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
GPT-5.6 Sol (Low) is off the frontier: at the same or lower cost, GPT-6.1 Sol (High) scores 50.20 for $521.

GLM-5.1 (Reasoning)GPT-5.6 Sol (Low)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-5-1/gpt-5-6-sol-low · Markdown: /api/v1/compare/glm-5-1/gpt-5-6-sol-low?format=md · llms.txt · agent skill