Claude Fable 5.2 (Max, Default Fallback) vs GPT-6 Luna (Xhigh)
Which is better for the money: Claude Fable 5.2 (Max, Default Fallback) by Anthropic or GPT-6 Luna (Xhigh) by OpenAI? 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 (Max, Default Fallback) scores 41.1 points higher (64.6 vs 23.5) but costs 259× as much to run the benchmark ($22191 vs $85.7; flagship vs mid-range cost classes). They are not alternatives at one budget: pick Claude Fable 5.2 (Max, Default Fallback) when you need intelligence above 23.5, and GPT-6 Luna (Xhigh) when 23.5 is enough.
| Metric | Claude Fable 5.2 (Max, Default Fallback) | GPT-6 Luna (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 64.6 | 23.5 | −63.6% GPT-6 Luna (Xhigh) is 63.6% less intelligent |
| Total AA cost (lower is better) | $22,191.42 | $85.74 | −99.6% GPT-6 Luna (Xhigh) is 99.6% cheaper |
| End-to-end time (lower is better) | 258.66s | 43.48s | −83.2% GPT-6 Luna (Xhigh) is 83.2% faster |
| Price per 1M tokens (in / out) | $8.00 / $40.0 | $0.10 / $0.50 | |
| Input modalities | Text, Image | Text, Image |
GPT-6 Luna (Xhigh) vs Claude Fable 5.2 (Max, Default Fallback): 63.6% less intelligence, 99.6% less cost to run the AA benchmark, and 83.2% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Fable 5.2 (Max, Default Fallback) is on today's frontier: nothing is both smarter and cheaper.
- GPT-6 Luna (Xhigh) is off the frontier: at the same or lower cost, Claude Haiku 5.5 (Medium) scores 24.60 for $72.7.
Claude Fable 5.2 (Max, Default Fallback)GPT-6 Luna (Xhigh)Today's Pareto frontierEvery other model
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