Kimi K3.1 Pro vs Mistral Small 4 (Reasoning)
Which is better for the money: Kimi K3.1 Pro by Kimi or Mistral Small 4 (Reasoning) by Mistral? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-25.
Trade-off
Verdict
Depends on your budget
Kimi K3.1 Pro scores 43.8 points higher (55.1 vs 11.3) but costs 73× as much to run the benchmark ($3117 vs $42.5; flagship vs budget cost classes). They are not alternatives at one budget: pick Kimi K3.1 Pro when you need intelligence above 11.3, and Mistral Small 4 (Reasoning) when 11.3 is enough.
| Metric | Kimi K3.1 Pro | Mistral Small 4 (Reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 55.1 | 11.3 | −79.5% Mistral Small 4 (Reas… is 79.5% less intelligent |
| Total AA cost (lower is better) | $3,117.31 | $42.50 | −98.6% Mistral Small 4 (Reas… is 98.6% cheaper |
| End-to-end time (lower is better) | 46.53s | 14.77s | −68.3% Mistral Small 4 (Reas… is 68.3% faster |
| Price per 1M tokens (in / out) | $2.00 / $10.0 | $0.15 / $0.60 | |
| Input modalities | Text, Image | Text, Image |
Mistral Small 4 (Reasoning) vs Kimi K3.1 Pro: 79.5% less intelligence, 98.6% less cost to run the AA benchmark, and 68.3% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Kimi K3.1 Pro is on today's frontier: nothing is both smarter and cheaper.
- Mistral Small 4 (Reasoning) is off the frontier: at the same or lower cost, GPT-6 Luna (Medium) scores 29.90 for $31.2.
Kimi K3.1 ProMistral Small 4 (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/kimi-k3-1-pro/mistral-small-4 · Markdown: /api/v1/compare/kimi-k3-1-pro/mistral-small-4?format=md · llms.txt · agent skill