GPT-5.6 Sol (Medium) vs Kimi K3.1 Pro
Which is better for the money: GPT-5.6 Sol (Medium) 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 15.9 points higher (55.1 vs 39.2) but costs 3.1× as much to run the benchmark ($3117 vs $997; flagship vs premium cost classes). They are not alternatives at one budget: pick Kimi K3.1 Pro when you need intelligence above 39.2, and GPT-5.6 Sol (Medium) when 39.2 is enough.
| Metric | GPT-5.6 Sol (Medium) | Kimi K3.1 Pro | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 39.2 | 55.1 | +40.6% Kimi K3.1 Pro is 40.6% more intelligent |
| Total AA cost (lower is better) | $997.39 | $3,117.31 | +212.5% Kimi K3.1 Pro is 3.1× more expensive |
| End-to-end time (lower is better) | 10.00s | 42.64s | +326.4% Kimi K3.1 Pro is 326.4% 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 (Medium): 40.6% more intelligence, 212.5% more cost to run the AA benchmark, and 326.4% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.6 Sol (Medium) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
- Kimi K3.1 Pro is on today's frontier: nothing is both smarter and cheaper.
GPT-5.6 Sol (Medium)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-medium/kimi-k3-1-pro · Markdown: /api/v1/compare/gpt-5-6-sol-medium/kimi-k3-1-pro?format=md · llms.txt · agent skill