Claude Fable 5.1 (Max, Default Fallback) vs GPT-6 Astra (Max)
Which is better for the money: Claude Fable 5.1 (Max, Default Fallback) by Anthropic or GPT-6 Astra (Max) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Trade-off
Verdict
Depends on your budget
Claude Fable 5.1 (Max, Default Fallback) scores 0.7 points higher (53.4 vs 52.7) but costs 2.5× as much to run the benchmark ($13129 vs $5324; both flagship class). Pick Claude Fable 5.1 (Max, Default Fallback) when the extra intelligence is worth the premium, otherwise GPT-6 Astra (Max).
| Metric | Claude Fable 5.1 (Max, Default Fallback) | GPT-6 Astra (Max) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 53.4 | 52.7 | −1.3% GPT-6 Astra (Max) is 1.3% less intelligent |
| Total AA cost (lower is better) | $13,128.86 | $5,324.10 | −59.4% GPT-6 Astra (Max) is 59.4% cheaper |
| End-to-end time (lower is better) | 251.24s | 388.52s | +54.6% GPT-6 Astra (Max) is 54.6% slower |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $10.0 / $50.0 | |
| Input modalities | Text, Image | Text, Image |
GPT-6 Astra (Max) vs Claude Fable 5.1 (Max, Default Fallback): 1.3% less intelligence, 59.4% less cost to run the AA benchmark, and 54.6% slower end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Fable 5.1 (Max, Default Fallback) is off the frontier: at the same or lower cost, Claude Opus 5.5 (Max, Default Fallback) scores 57.60 for $8708.
- GPT-6 Astra (Max) is off the frontier: at the same or lower cost, Claude Opus 5.5 (Xhigh, Default Fallback) scores 56.00 for $4057.
Claude Fable 5.1 (Max, Default Fallback)GPT-6 Astra (Max)Today's Pareto frontierEvery other model
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