GPT-5.6 Luna (Non-reasoning) vs Kimi K3.1 Pro
Which is better for the money: GPT-5.6 Luna (Non-reasoning) by OpenAI or Kimi K3.1 Pro by Kimi? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Trade-off
Verdict
Depends on your budget
Kimi K3.1 Pro scores 39.6 points higher (55.1 vs 15.5) but costs 136× as much to run the benchmark ($3117 vs $23.0; flagship vs budget cost classes). They are not alternatives at one budget: pick Kimi K3.1 Pro when you need intelligence above 15.5, and GPT-5.6 Luna (Non-reasoning) when 15.5 is enough.
| Metric | GPT-5.6 Luna (Non-reasoning) | Kimi K3.1 Pro | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 15.5 | 55.1 | +255.5% Kimi K3.1 Pro is 3.6× more intelligent |
| Total AA cost (lower is better) | $22.97 | $3,117.31 | +13471.2% Kimi K3.1 Pro is 136× more expensive |
| End-to-end time (lower is better) | 5.06s | 55.12s | +989.3% Kimi K3.1 Pro is 989.3% slower |
| Price per 1M tokens (in / out) | $0.20 / $1.20 | $2.00 / $10.0 | |
| Input modalities | Text, Image | Text, Image |
Kimi K3.1 Pro vs GPT-5.6 Luna (Non-reasoning): 255.5% more intelligence, 13471.2% more cost to run the AA benchmark, and 989.3% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.6 Luna (Non-reasoning) is off the frontier: at the same or lower cost, GPT-6 Luna (Low) scores 21.50 for $10.6.
- Kimi K3.1 Pro is on today's frontier: nothing is both smarter and cheaper.
GPT-5.6 Luna (Non-reasoning)Kimi K3.1 ProToday'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-non-reasoning/kimi-k3-1-pro · Markdown: /api/v1/compare/gpt-5-6-luna-non-reasoning/kimi-k3-1-pro?format=md · llms.txt · agent skill