Claude Sonnet 5 (Low) vs GPT-5.6 Luna (High)
Which is better for the money: Claude Sonnet 5 (Low) 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 Sonnet 5 (Low): 32.1% more intelligence, 83.4% less cost to run the AA benchmark, and 60.0% slower end-to-end.
| Metric | Claude Sonnet 5 (Low) | GPT-5.6 Luna (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 24.3 | 32.1 | +32.1% GPT-5.6 Luna (High) is 32.1% more intelligent |
| Total AA cost (lower is better) | $652.70 | $108.15 | −83.4% GPT-5.6 Luna (High) is 83.4% cheaper |
| End-to-end time (lower is better) | 9.14s | 14.62s | +60.0% GPT-5.6 Luna (High) is 60.0% 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 (Low) is off the frontier: at the same or lower cost, GPT-6.1 Sol (High) scores 50.20 for $521.
- 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 Sonnet 5 (Low)GPT-5.6 Luna (High)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-low/gpt-5-6-luna-high · Markdown: /api/v1/compare/claude-sonnet-5-low/gpt-5-6-luna-high?format=md · llms.txt · agent skill