Claude 4.5 Sonnet (Reasoning) vs GPT-5.6 Luna (High)
Which is better for the money: Claude 4.5 Sonnet (Reasoning) 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.
Clear winner
Verdict
Pick GPT-5.6 Luna (High)
GPT-5.6 Luna (High) vs Claude 4.5 Sonnet (Reasoning): 55.1% more intelligence, 92.8% less cost to run the AA benchmark, and 31.8% faster end-to-end.
| Metric | Claude 4.5 Sonnet (Reasoning) | GPT-5.6 Luna (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 20.7 | 32.1 | +55.1% GPT-5.6 Luna (High) is 55.1% more intelligent |
| Total AA cost (lower is better) | $1,501.22 | $108.15 | −92.8% GPT-5.6 Luna (High) is 92.8% cheaper |
| End-to-end time (lower is better) | 21.44s | 14.62s | −31.8% GPT-5.6 Luna (High) is 31.8% faster |
| Price per 1M tokens (in / out) | $3.00 / $15.0 | $0.20 / $1.20 | |
| Input modalities | Text, Image | Text, Image |
Today's Pareto frontier
Against the frontier
- Claude 4.5 Sonnet (Reasoning) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
- 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 4.5 Sonnet (Reasoning)GPT-5.6 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-4-5-sonnet-thinking/gpt-5-6-luna-high · Markdown: /api/v1/compare/claude-4-5-sonnet-thinking/gpt-5-6-luna-high?format=md · llms.txt · agent skill