Claude Sonnet 5 (Max) vs GPT-5.6 Luna (High)
Which is better for the money: Claude Sonnet 5 (Max) by Anthropic or GPT-5.6 Luna (High) 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 (Max) scores 6.1 points higher (38.2 vs 32.1) but costs 65× as much to run the benchmark ($6998 vs $108; flagship vs mid-range cost classes). They are not alternatives at one budget: pick Claude Sonnet 5 (Max) when you need intelligence above 32.1, and GPT-5.6 Luna (High) when 32.1 is enough.
| Metric | Claude Sonnet 5 (Max) | GPT-5.6 Luna (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 38.2 | 32.1 | −16.0% GPT-5.6 Luna (High) is 16.0% less intelligent |
| Total AA cost (lower is better) | $6,998.25 | $108.15 | −98.5% GPT-5.6 Luna (High) is 98.5% cheaper |
| End-to-end time (lower is better) | 209.46s | 13.41s | −93.6% GPT-5.6 Luna (High) is 93.6% faster |
| Price per 1M tokens (in / out) | $2.00 / $10.0 | $0.20 / $1.20 | |
| Input modalities | Text, Image | Text, Image |
GPT-5.6 Luna (High) vs Claude Sonnet 5 (Max): 16.0% less intelligence, 98.5% less cost to run the AA benchmark, and 93.6% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Sonnet 5 (Max) is off the frontier: at the same or lower cost, Claude Opus 5.5 (Xhigh, Default Fallback) scores 56.00 for $4057.
- GPT-5.6 Luna (High) is off the frontier: at the same or lower cost, Claude Haiku 5.5 (High) scores 37.80 for $94.1.
Claude Sonnet 5 (Max)GPT-5.6 Luna (High)Today's Pareto frontierEvery other model
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