GPT-5.6 Luna (Low) vs GPT-6.1 Sol (Low)
Which is better for the money: GPT-5.6 Luna (Low) by OpenAI or GPT-6.1 Sol (Low) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-27.
Trade-off
Verdict
Depends on your budget
GPT-6.1 Sol (Low) scores 21.1 points higher (42.1 vs 21.0) but costs 9.3× as much to run the benchmark ($250 vs $27.0; mid-range vs budget cost classes). They are not alternatives at one budget: pick GPT-6.1 Sol (Low) when you need intelligence above 21.0, and GPT-5.6 Luna (Low) when 21.0 is enough.
| Metric | GPT-5.6 Luna (Low) | GPT-6.1 Sol (Low) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 21.0 | 42.1 | +100.5% GPT-6.1 Sol (Low) is 2.0× more intelligent |
| Total AA cost (lower is better) | $27.02 | $250.48 | +827.0% GPT-6.1 Sol (Low) is 9.3× more expensive |
| End-to-end time (lower is better) | 5.68s | 11.89s | +109.3% GPT-6.1 Sol (Low) is 109.3% slower |
| Price per 1M tokens (in / out) | $0.20 / $1.20 | $2.00 / $10.0 | |
| Input modalities | Text, Image | Text, Image |
GPT-6.1 Sol (Low) vs GPT-5.6 Luna (Low): 100.5% more intelligence, 827.0% more cost to run the AA benchmark, and 109.3% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.6 Luna (Low) is off the frontier: at the same or lower cost, GPT-6 Luna (Low) scores 21.50 for $10.6.
- 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-5.6 Luna (Low)GPT-6.1 Sol (Low)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-5-6-luna-low/gpt-6-1-sol-low · Markdown: /api/v1/compare/gpt-5-6-luna-low/gpt-6-1-sol-low?format=md · llms.txt · agent skill