GPT-5.6 Sol (Xhigh) vs Kimi K3.1 Pro
Which is better for the money: GPT-5.6 Sol (Xhigh) 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 11.1 points higher (55.1 vs 44.0) but costs 1.5× as much to run the benchmark ($3117 vs $2082; both flagship class). Pick Kimi K3.1 Pro when the extra intelligence is worth the premium, otherwise GPT-5.6 Sol (Xhigh).
| Metric | GPT-5.6 Sol (Xhigh) | Kimi K3.1 Pro | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 44.0 | 55.1 | +25.2% Kimi K3.1 Pro is 25.2% more intelligent |
| Total AA cost (lower is better) | $2,082.28 | $3,117.31 | +49.7% Kimi K3.1 Pro is 49.7% more expensive |
| End-to-end time (lower is better) | 28.41s | 42.64s | +50.1% Kimi K3.1 Pro is 50.1% slower |
| Price per 1M tokens (in / out) | $4.00 / $20.0 | $2.00 / $10.0 | |
| Input modalities | Text, Image | Text, Image |
Kimi K3.1 Pro vs GPT-5.6 Sol (Xhigh): 25.2% more intelligence, 49.7% more cost to run the AA benchmark, and 50.1% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.6 Sol (Xhigh) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
- Kimi K3.1 Pro is on today's frontier: nothing is both smarter and cheaper.
GPT-5.6 Sol (Xhigh)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-sol-xhigh/kimi-k3-1-pro · Markdown: /api/v1/compare/gpt-5-6-sol-xhigh/kimi-k3-1-pro?format=md · llms.txt · agent skill