GPT-5.6 Luna (Low) vs Kimi K2.6 (Reasoning)
Which is better for the money: GPT-5.6 Luna (Low) 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.
Trade-off
Verdict
Depends on your budget
Kimi K2.6 (Reasoning) scores 6.0 points higher (27.0 vs 21.0) but costs 57× as much to run the benchmark ($1528 vs $27.0; premium vs budget cost classes). They are not alternatives at one budget: pick Kimi K2.6 (Reasoning) when you need intelligence above 21.0, and GPT-5.6 Luna (Low) when 21.0 is enough.
| Metric | GPT-5.6 Luna (Low) | Kimi K2.6 (Reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 21.0 | 27.0 | +28.6% Kimi K2.6 (Reasoning) is 28.6% more intelligent |
| Total AA cost (lower is better) | $27.02 | $1,528.20 | +5555.8% Kimi K2.6 (Reasoning) is 57× more expensive |
| End-to-end time (lower is better) | 5.90s | 54.26s | +819.7% Kimi K2.6 (Reasoning) is 819.7% slower |
| Price per 1M tokens (in / out) | $0.20 / $1.20 | $0.95 / $4.00 | |
| Input modalities | Text, Image | Text, Image, Video |
Kimi K2.6 (Reasoning) vs GPT-5.6 Luna (Low): 28.6% more intelligence, 5555.8% more cost to run the AA benchmark, and 819.7% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.6 Luna (Low) is off the frontier: at the same or lower cost, GPT-6 Luna (Low) scores 21.50 for $10.6.
- 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 (Low)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-low/kimi-k2-6 · Markdown: /api/v1/compare/gpt-5-6-luna-low/kimi-k2-6?format=md · llms.txt · agent skill