Claude Sonnet 5 (Xhigh) vs GLM-5.3-Flash
Which is better for the money: Claude Sonnet 5 (Xhigh) by Anthropic or GLM-5.3-Flash by Z AI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-24.
Clear winner
Verdict
Pick GLM-5.3-Flash
GLM-5.3-Flash vs Claude Sonnet 5 (Xhigh): 21.5% more intelligence, 90.6% less cost to run the AA benchmark, and 87.6% slower end-to-end.
| Metric | Claude Sonnet 5 (Xhigh) | GLM-5.3-Flash | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 34.4 | 41.8 | +21.5% GLM-5.3-Flash is 21.5% more intelligent |
| Total AA cost (lower is better) | $3,255.40 | $305.52 | −90.6% GLM-5.3-Flash is 90.6% cheaper |
| End-to-end time (lower is better) | 20.97s | 39.33s | +87.6% GLM-5.3-Flash is 87.6% slower |
| Price per 1M tokens (in / out) | $2.00 / $10.0 | $0.15 / $0.50 | |
| Input modalities | Text, Image | Text, Image |
Today's Pareto frontier
Against the frontier
- Claude Sonnet 5 (Xhigh) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
- GLM-5.3-Flash is off the frontier: at the same or lower cost, MiMo-V2.6-Pro scores 46.30 for $207.
Claude Sonnet 5 (Xhigh)GLM-5.3-FlashToday's Pareto frontierOpen-weights frontierEvery other model
Matchup
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-sonnet-5-xhigh/glm-5-3-flash · Markdown: /api/v1/compare/claude-sonnet-5-xhigh/glm-5-3-flash?format=md · llms.txt · agent skill