Claude Sonnet 5 (Xhigh) vs GPT-5.6 Luna (Max)
Which is better for the money: Claude Sonnet 5 (Xhigh) 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.
Clear winner
Verdict
Pick GPT-5.6 Luna (Max)
GPT-5.6 Luna (Max) vs Claude Sonnet 5 (Xhigh): 8.4% more intelligence, 90.2% less cost to run the AA benchmark, and 278.7% slower end-to-end.
| Metric | Claude Sonnet 5 (Xhigh) | GPT-5.6 Luna (Max) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 34.4 | 37.3 | +8.4% GPT-5.6 Luna (Max) is 8.4% more intelligent |
| Total AA cost (lower is better) | $3,255.40 | $319.93 | −90.2% GPT-5.6 Luna (Max) is 90.2% cheaper |
| End-to-end time (lower is better) | 30.12s | 114.06s | +278.7% GPT-5.6 Luna (Max) is 278.7% slower |
| Price per 1M tokens (in / out) | $2.00 / $10.0 | $0.20 / $1.20 | |
| Input modalities | Text, Image | Text, Image |
Today's Pareto frontier
Against the frontier
- Claude Sonnet 5 (Xhigh) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
- 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 Sonnet 5 (Xhigh)GPT-5.6 Luna (Max)Today's Pareto frontierEvery other model
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-sonnet-5-xhigh/gpt-5-6-luna · Markdown: /api/v1/compare/claude-sonnet-5-xhigh/gpt-5-6-luna?format=md · llms.txt · agent skill