GPT-5.6 Terra (Xhigh) vs Kimi K3.1 Pro
Which is better for the money: GPT-5.6 Terra (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 2026-10-26.
Trade-off
Verdict
Depends on your budget
Kimi K3.1 Pro scores 17.1 points higher (55.1 vs 38.0) but costs 2.6× as much to run the benchmark ($3117 vs $1187; flagship vs premium cost classes). Pick Kimi K3.1 Pro when the extra intelligence is worth the premium, otherwise GPT-5.6 Terra (Xhigh).
| Metric | GPT-5.6 Terra (Xhigh) | Kimi K3.1 Pro | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 38.0 | 55.1 | +45.0% Kimi K3.1 Pro is 45.0% more intelligent |
| Total AA cost (lower is better) | $1,186.77 | $3,117.31 | +162.7% Kimi K3.1 Pro is 2.6× more expensive |
| End-to-end time (lower is better) | 36.37s | 55.12s | +51.6% Kimi K3.1 Pro is 51.6% slower |
| Price per 1M tokens (in / out) | $2.00 / $12.0 | $2.00 / $10.0 | |
| Input modalities | Text, Image | Text, Image |
Kimi K3.1 Pro vs GPT-5.6 Terra (Xhigh): 45.0% more intelligence, 162.7% more cost to run the AA benchmark, and 51.6% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.6 Terra (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 Terra (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-terra-xhigh/kimi-k3-1-pro · Markdown: /api/v1/compare/gpt-5-6-terra-xhigh/kimi-k3-1-pro?format=md · llms.txt · agent skill