GPT-5.6 Luna (Max) vs Kimi K3.1 Pro
Which is better for the money: GPT-5.6 Luna (Max) by OpenAI or Kimi K3.1 Pro by Kimi? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-24.
Trade-off
Verdict
Depends on your budget
Kimi K3.1 Pro scores 17.8 points higher (55.1 vs 37.3) but costs 9.7× as much to run the benchmark ($3117 vs $320; flagship vs mid-range cost classes). They are not alternatives at one budget: pick Kimi K3.1 Pro when you need intelligence above 37.3, and GPT-5.6 Luna (Max) when 37.3 is enough.
| Metric | GPT-5.6 Luna (Max) | Kimi K3.1 Pro | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 37.3 | 55.1 | +47.7% Kimi K3.1 Pro is 47.7% more intelligent |
| Total AA cost (lower is better) | $319.93 | $3,117.31 | +874.4% Kimi K3.1 Pro is 9.7× more expensive |
| End-to-end time (lower is better) | 85.38s | 42.64s | −50.1% Kimi K3.1 Pro is 50.1% faster |
| 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 (Max): 47.7% more intelligence, 874.4% more cost to run the AA benchmark, and 50.1% faster end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.6 Luna (Max) is off the frontier: at the same or lower cost, MiMo-V2.6-Pro scores 46.30 for $207.
- Kimi K3.1 Pro is on today's frontier: nothing is both smarter and cheaper.
GPT-5.6 Luna (Max)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/kimi-k3-1-pro · Markdown: /api/v1/compare/gpt-5-6-luna/kimi-k3-1-pro?format=md · llms.txt · agent skill