Claude Fable 5.2 (High, Default Fallback) vs GLM-5.3 (Low)
Which is better for the money: Claude Fable 5.2 (High, Default Fallback) by Anthropic or GLM-5.3 (Low) by Z AI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-11-10.
Trade-off
Verdict
Depends on your budget
Claude Fable 5.2 (High, Default Fallbac… scores 38.7 points higher (61.8 vs 23.1) but costs 5.8× as much to run the benchmark ($7106 vs $1219; flagship vs premium cost classes). They are not alternatives at one budget: pick Claude Fable 5.2 (High, Default Fallbac… when you need intelligence above 23.1, and GLM-5.3 (Low) when 23.1 is enough.
| Metric | Claude Fable 5.2 (High, Default Fallback) | GLM-5.3 (Low) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 61.8 | 23.1 | −62.6% GLM-5.3 (Low) is 62.6% less intelligent |
| Total AA cost (lower is better) | $7,105.77 | $1,218.55 | −82.9% GLM-5.3 (Low) is 82.9% cheaper |
| End-to-end time (lower is better) | 36.05s | 34.46s | −4.4% GLM-5.3 (Low) is 4.4% faster |
| Price per 1M tokens (in / out) | $8.00 / $40.0 | $1.40 / $4.40 | |
| Input modalities | Text, Image | Text |
GLM-5.3 (Low) vs Claude Fable 5.2 (High, Default Fallback): 62.6% less intelligence, 82.9% less cost to run the AA benchmark, and 4.4% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Fable 5.2 (High, Default Fallback) is on today's frontier: nothing is both smarter and cheaper.
- GLM-5.3 (Low) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 54.60 for $1124.
Claude Fable 5.2 (High, Default Fallback)GLM-5.3 (Low)Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
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