Claude Fable 5.1 (High, Default Fallback) vs GPT-6 Astra (High)
Which is better for the money: Claude Fable 5.1 (High, Default Fallback) by Anthropic or GPT-6 Astra (High) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-27.
Trade-off
Verdict
Depends on your budget
Claude Fable 5.1 (High, Default Fallbac… scores 0.3 points higher (51.2 vs 50.9) but costs 1.8× as much to run the benchmark ($5242 vs $2925; both flagship class). Pick Claude Fable 5.1 (High, Default Fallbac… when the extra intelligence is worth the premium, otherwise GPT-6 Astra (High).
| Metric | Claude Fable 5.1 (High, Default Fallback) | GPT-6 Astra (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 51.2 | 50.9 | −0.6% GPT-6 Astra (High) is 0.6% less intelligent |
| Total AA cost (lower is better) | $5,241.59 | $2,925.01 | −44.2% GPT-6 Astra (High) is 44.2% cheaper |
| End-to-end time (lower is better) | 25.53s | 70.19s | +174.9% GPT-6 Astra (High) is 174.9% slower |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $10.0 / $50.0 | |
| Input modalities | Text, Image | Text, Image |
GPT-6 Astra (High) vs Claude Fable 5.1 (High, Default Fallback): 0.6% less intelligence, 44.2% less cost to run the AA benchmark, and 174.9% slower end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Fable 5.1 (High, Default Fallback) is off the frontier: at the same or lower cost, Claude Opus 5.5 (Xhigh, Default Fallback) scores 56.00 for $4057.
- GPT-6 Astra (High) is off the frontier: at the same or lower cost, Claude Opus 5.5 (High, Default Fallback) scores 53.60 for $2172.
Claude Fable 5.1 (High, Default Fallback)GPT-6 Astra (High)Today's Pareto frontierEvery other model
Matchup
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