Claude Opus 5 (Low) vs GPT-6 Luna (High)
Which is better for the money: Claude Opus 5 (Low) by Anthropic or GPT-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 Opus 5 (Low) scores 6.5 points higher (39.4 vs 32.9) but costs 33× as much to run the benchmark ($1561 vs $47.9; premium vs budget cost classes). They are not alternatives at one budget: pick Claude Opus 5 (Low) when you need intelligence above 32.9, and GPT-6 Luna (High) when 32.9 is enough.
| Metric | Claude Opus 5 (Low) | GPT-6 Luna (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 39.4 | 32.9 | −16.5% GPT-6 Luna (High) is 16.5% less intelligent |
| Total AA cost (lower is better) | $1,560.91 | $47.85 | −96.9% GPT-6 Luna (High) is 96.9% cheaper |
| End-to-end time (lower is better) | 11.37s | 16.20s | +42.5% GPT-6 Luna (High) is 42.5% slower |
| Price per 1M tokens (in / out) | $5.00 / $25.0 | $0.10 / $0.50 | |
| Input modalities | Text, Image | Text, Image |
GPT-6 Luna (High) vs Claude Opus 5 (Low): 16.5% less intelligence, 96.9% less cost to run the AA benchmark, and 42.5% slower end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Opus 5 (Low) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
- GPT-6 Luna (High) is on today's frontier: nothing is both smarter and cheaper.
Claude Opus 5 (Low)GPT-6 Luna (High)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-low/gpt-6-luna-high · Markdown: /api/v1/compare/claude-opus-5-low/gpt-6-luna-high?format=md · llms.txt · agent skill