GPT-6 Astra (High) vs GPT-6 Luna (Non-reasoning)
Which is better for the money: GPT-6 Astra (High) by OpenAI or GPT-6 Luna (Non-reasoning) 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
GPT-6 Astra (High) scores 32.4 points higher (50.9 vs 18.5) but costs 153× as much to run the benchmark ($2925 vs $19.2; flagship vs budget cost classes). They are not alternatives at one budget: pick GPT-6 Astra (High) when you need intelligence above 18.5, and GPT-6 Luna (Non-reasoning) when 18.5 is enough.
| Metric | GPT-6 Astra (High) | GPT-6 Luna (Non-reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 50.9 | 18.5 | −63.7% GPT-6 Luna (Non-reaso… is 63.7% less intelligent |
| Total AA cost (lower is better) | $2,925.01 | $19.16 | −99.3% GPT-6 Luna (Non-reaso… is 99.3% cheaper |
| End-to-end time (lower is better) | 70.19s | 5.05s | −92.8% GPT-6 Luna (Non-reaso… is 92.8% faster |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $0.10 / $0.50 | |
| Input modalities | Text, Image | Text, Image |
GPT-6 Luna (Non-reasoning) vs GPT-6 Astra (High): 63.7% less intelligence, 99.3% less cost to run the AA benchmark, and 92.8% faster end-to-end.
Today's Pareto frontier
Against the frontier
- 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.
- GPT-6 Luna (Non-reasoning) is off the frontier: at the same or lower cost, GPT-6 Luna (Low) scores 21.50 for $10.6.
GPT-6 Astra (High)GPT-6 Luna (Non-reasoning)Today's Pareto frontierEvery other model
Matchup
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