Claude Opus 5 (High) vs GPT-5.6 Luna (Max)
Which is better for the money: Claude Opus 5 (High) by Anthropic or GPT-5.6 Luna (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 Opus 5 (High) scores 10.8 points higher (48.1 vs 37.3) but costs 14× as much to run the benchmark ($4332 vs $320; flagship vs mid-range cost classes). They are not alternatives at one budget: pick Claude Opus 5 (High) when you need intelligence above 37.3, and GPT-5.6 Luna (Max) when 37.3 is enough.
| Metric | Claude Opus 5 (High) | GPT-5.6 Luna (Max) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 48.1 | 37.3 | −22.5% GPT-5.6 Luna (Max) is 22.5% less intelligent |
| Total AA cost (lower is better) | $4,331.68 | $319.93 | −92.6% GPT-5.6 Luna (Max) is 92.6% cheaper |
| End-to-end time (lower is better) | 28.15s | 114.06s | +305.2% GPT-5.6 Luna (Max) is 305.2% slower |
| Price per 1M tokens (in / out) | $5.00 / $25.0 | $0.20 / $1.20 | |
| Input modalities | Text, Image | Text, Image |
GPT-5.6 Luna (Max) vs Claude Opus 5 (High): 22.5% less intelligence, 92.6% less cost to run the AA benchmark, and 305.2% slower end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Opus 5 (High) 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 (Max) is off the frontier: at the same or lower cost, MiMo-V2.6-Pro scores 46.30 for $207.
Claude Opus 5 (High)GPT-5.6 Luna (Max)Today's Pareto frontierEvery other model
Matchup
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-opus-5-high/gpt-5-6-luna · Markdown: /api/v1/compare/claude-opus-5-high/gpt-5-6-luna?format=md · llms.txt · agent skill