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

Which is better for the money: GPT-6 Luna (Low) by OpenAI or Kimi K3 (Max) by Kimi? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-25.

Trade-off

OpenAIGPT-6 Luna (Low)On the frontier

Intelligence: 21.50
Total cost: $10.6

KimiKimi K3 (Max)Off the frontier

Intelligence: 43.60
Total cost: $3658

Verdict

Depends on your budget

Kimi K3 (Max) scores 22.1 points higher (43.6 vs 21.5) but costs 344× as much to run the benchmark ($3658 vs $10.6; flagship vs budget cost classes). They are not alternatives at one budget: pick Kimi K3 (Max) when you need intelligence above 21.5, and GPT-6 Luna (Low) when 21.5 is enough.

Metric	GPT-6 Luna (Low)	Kimi K3 (Max)	Difference
Intelligence (higher is better)	21.5	43.6	+102.8% Kimi K3 (Max) is 2.0× more intelligent
Total AA cost (lower is better)	$10.63	$3,658.07	+34312.7% Kimi K3 (Max) is 344× more expensive
End-to-end time (lower is better)	6.80s	53.89s	+692.5% Kimi K3 (Max) is 692.5% 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 (Low): 102.8% more intelligence, 34312.7% more cost to run the AA benchmark, and 692.5% slower end-to-end.

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

Today's Pareto frontier

Against the frontier

GPT-6 Luna (Low) 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 (Low)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-low/kimi-k3 · Markdown: /api/v1/compare/gpt-6-luna-low/kimi-k3?format=md · llms.txt · agent skill