GPT-6 Luna (Xhigh) vs Kimi K3 (Max)

Which is better for the money: GPT-6 Luna (Xhigh) by OpenAI or Kimi K3 (Max) by Kimi? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-24.

Trade-off

OpenAIGPT-6 Luna (Xhigh)On the frontier

Intelligence: 34.60
Total cost: $66.8

KimiKimi K3 (Max)Off the frontier

Intelligence: 43.60
Total cost: $3658

Verdict

Depends on your budget

Kimi K3 (Max) scores 9.0 points higher (43.6 vs 34.6) but costs 55× as much to run the benchmark ($3658 vs $66.8; flagship vs mid-range cost classes). They are not alternatives at one budget: pick Kimi K3 (Max) when you need intelligence above 34.6, and GPT-6 Luna (Xhigh) when 34.6 is enough.

Metric	GPT-6 Luna (Xhigh)	Kimi K3 (Max)	Difference
Intelligence (higher is better)	34.6	43.6	+26.0% Kimi K3 (Max) is 26.0% more intelligent
Total AA cost (lower is better)	$66.81	$3,658.07	+5375.3% Kimi K3 (Max) is 55× more expensive
End-to-end time (lower is better)	21.27s	63.08s	+196.6% Kimi K3 (Max) is 196.6% slower
Price per 1M tokens (in / out)	$0.10 / $0.50	$3.00 / $15.0
Input modalities	Text, Image	Text, Image

Kimi K3 (Max) vs GPT-6 Luna (Xhigh): 26.0% more intelligence, 5375.3% more cost to run the AA benchmark, and 196.6% slower end-to-end.

Open this matchup in the interactive picker GPT-6 Luna (Xhigh): what beats it Kimi K3 (Max): what beats it

Today's Pareto frontier

Against the frontier

GPT-6 Luna (Xhigh) is on today's frontier: nothing is both smarter and cheaper.
Kimi K3 (Max) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.

GPT-6 Luna (Xhigh)Kimi K3 (Max)Today's Pareto frontierOpen-weights frontierEvery other model

Matchup

Compare something else

Agents: Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-6-luna-xhigh/kimi-k3 · Markdown: /api/v1/compare/gpt-6-luna-xhigh/kimi-k3?format=md · llms.txt · agent skill