Claude 4.5 Sonnet (Reasoning) vs GPT-6 Luna (High)
Which is better for the money: Claude 4.5 Sonnet (Reasoning) 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.
Clear winner
Verdict
Pick GPT-6 Luna (High)
GPT-6 Luna (High) vs Claude 4.5 Sonnet (Reasoning): 58.9% more intelligence, 96.8% less cost to run the AA benchmark, and 25.4% faster end-to-end.
| Metric | Claude 4.5 Sonnet (Reasoning) | GPT-6 Luna (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 20.7 | 32.9 | +58.9% GPT-6 Luna (High) is 58.9% more intelligent |
| Total AA cost (lower is better) | $1,501.22 | $47.85 | −96.8% GPT-6 Luna (High) is 96.8% cheaper |
| End-to-end time (lower is better) | 21.71s | 16.20s | −25.4% GPT-6 Luna (High) is 25.4% faster |
| Price per 1M tokens (in / out) | $3.00 / $15.0 | $0.10 / $0.50 | |
| 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-6 Luna (High) is on today's frontier: nothing is both smarter and cheaper.
Claude 4.5 Sonnet (Reasoning)GPT-6 Luna (High)Today's Pareto frontierEvery other model
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