GPT-6.1 Sol (Low) vs GPT-6 Luna (Medium)
Which is better for the money: GPT-6.1 Sol (Low) by OpenAI or GPT-6 Luna (Medium) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-24.
Trade-off
Verdict
Depends on your budget
GPT-6.1 Sol (Low) scores 12.2 points higher (42.1 vs 29.9) but costs 8.0× as much to run the benchmark ($250 vs $31.2; mid-range vs budget cost classes). They are not alternatives at one budget: pick GPT-6.1 Sol (Low) when you need intelligence above 29.9, and GPT-6 Luna (Medium) when 29.9 is enough.
| Metric | GPT-6.1 Sol (Low) | GPT-6 Luna (Medium) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 42.1 | 29.9 | −29.0% GPT-6 Luna (Medium) is 29.0% less intelligent |
| Total AA cost (lower is better) | $250.48 | $31.17 | −87.6% GPT-6 Luna (Medium) is 87.6% cheaper |
| End-to-end time (lower is better) | 12.52s | 8.25s | −34.1% GPT-6 Luna (Medium) is 34.1% faster |
| Price per 1M tokens (in / out) | $2.00 / $10.0 | $0.10 / $0.50 | |
| Input modalities | Text, Image | Text, Image |
GPT-6 Luna (Medium) vs GPT-6.1 Sol (Low): 29.0% less intelligence, 87.6% less cost to run the AA benchmark, and 34.1% faster end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-6.1 Sol (Low) is off the frontier: at the same or lower cost, MiMo-V2.6-Pro scores 46.30 for $207.
- GPT-6 Luna (Medium) is on today's frontier: nothing is both smarter and cheaper.
GPT-6.1 Sol (Low)GPT-6 Luna (Medium)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/gpt-6-1-sol-low/gpt-6-luna-medium · Markdown: /api/v1/compare/gpt-6-1-sol-low/gpt-6-luna-medium?format=md · llms.txt · agent skill