GPT-5.6 Luna (Xhigh) vs Kimi K2.6 (Reasoning)
Which is better for the money: GPT-5.6 Luna (Xhigh) by OpenAI or Kimi K2.6 (Reasoning) by Kimi? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Clear winner
Verdict
Pick GPT-5.6 Luna (Xhigh)
Kimi K2.6 (Reasoning) vs GPT-5.6 Luna (Xhigh): 22.0% less intelligence, 685.6% more cost to run the AA benchmark, and 15.7% slower end-to-end.
| Metric | GPT-5.6 Luna (Xhigh) | Kimi K2.6 (Reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 34.6 | 27.0 | −22.0% Kimi K2.6 (Reasoning) is 22.0% less intelligent |
| Total AA cost (lower is better) | $179.33 | $1,408.86 | +685.6% Kimi K2.6 (Reasoning) is 7.9× more expensive |
| End-to-end time (lower is better) | 45.80s | 52.97s | +15.7% Kimi K2.6 (Reasoning) is 15.7% slower |
| Price per 1M tokens (in / out) | $0.20 / $1.20 | $0.95 / $4.00 | |
| Input modalities | Text, Image | Text, Image, Video |
Today's Pareto frontier
Against the frontier
- GPT-5.6 Luna (Xhigh) is off the frontier: at the same or lower cost, GPT-6.1 Terra (Medium) scores 41.30 for $175.
- Kimi K2.6 (Reasoning) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
GPT-5.6 Luna (Xhigh)Kimi K2.6 (Reasoning)Today's Pareto frontierOpen-weights 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-xhigh/kimi-k2-6 · Markdown: /api/v1/compare/gpt-5-6-luna-xhigh/kimi-k2-6?format=md · llms.txt · agent skill