Claude Fable 5.2 (Medium, Default Fallback) vs GLM-5.3-Flash
Which is better for the money: Claude Fable 5.2 (Medium, Default Fallback) 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 2026-11-10.
Trade-off
Verdict
Depends on your budget
Claude Fable 5.2 (Medium, Default Fallb… scores 28.6 points higher (56.4 vs 27.8) but costs 8.9× as much to run the benchmark ($3360 vs $378; flagship vs mid-range cost classes). They are not alternatives at one budget: pick Claude Fable 5.2 (Medium, Default Fallb… when you need intelligence above 27.8, and GLM-5.3-Flash when 27.8 is enough.
| Metric | Claude Fable 5.2 (Medium, Default Fallback) | GLM-5.3-Flash | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 56.4 | 27.8 | −50.7% GLM-5.3-Flash is 50.7% less intelligent |
| Total AA cost (lower is better) | $3,359.66 | $377.94 | −88.8% GLM-5.3-Flash is 88.8% cheaper |
| End-to-end time (lower is better) | 28.35s | 46.01s | +62.3% GLM-5.3-Flash is 62.3% slower |
| Price per 1M tokens (in / out) | $8.00 / $40.0 | $0.15 / $0.50 | |
| Input modalities | Text, Image | Text, Image |
GLM-5.3-Flash vs Claude Fable 5.2 (Medium, Default Fallback): 50.7% less intelligence, 88.8% less cost to run the AA benchmark, and 62.3% slower end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Fable 5.2 (Medium, Default Fallback) is on today's frontier: nothing is both smarter and cheaper.
- GLM-5.3-Flash is off the frontier: at the same or lower cost, GPT-6.1 Terra (High) scores 42.40 for $267.
Claude Fable 5.2 (Medium, Default Fallback)GLM-5.3-FlashToday's Pareto frontierOpen-weights frontierEvery other model
Matchup
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