Claude Sonnet 5 (High) vs GPT-6 Luna (Low)
Which is better for the money: Claude Sonnet 5 (High) by Anthropic or GPT-6 Luna (Low) 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 Sonnet 5 (High) scores 10.2 points higher (31.7 vs 21.5) but costs 196× as much to run the benchmark ($2086 vs $10.6; flagship vs budget cost classes). They are not alternatives at one budget: pick Claude Sonnet 5 (High) when you need intelligence above 21.5, and GPT-6 Luna (Low) when 21.5 is enough.
| Metric | Claude Sonnet 5 (High) | GPT-6 Luna (Low) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 31.7 | 21.5 | −32.2% GPT-6 Luna (Low) is 32.2% less intelligent |
| Total AA cost (lower is better) | $2,086.04 | $10.63 | −99.5% GPT-6 Luna (Low) is 99.5% cheaper |
| End-to-end time (lower is better) | 21.74s | 7.32s | −66.3% GPT-6 Luna (Low) is 66.3% faster |
| Price per 1M tokens (in / out) | $2.00 / $10.0 | $0.10 / $0.50 | |
| Input modalities | Text, Image | Text, Image |
GPT-6 Luna (Low) vs Claude Sonnet 5 (High): 32.2% less intelligence, 99.5% less cost to run the AA benchmark, and 66.3% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Sonnet 5 (High) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
- GPT-6 Luna (Low) is on today's frontier: nothing is both smarter and cheaper.
Claude Sonnet 5 (High)GPT-6 Luna (Low)Today's Pareto frontierEvery other model
Matchup
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