Kimi K3.1 Pro vs Mistral Medium 3.5
Which is better for the money: Kimi K3.1 Pro by Kimi or Mistral Medium 3.5 by Mistral? 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 40.9 points higher (55.1 vs 14.2) but costs 2.5× as much to run the benchmark ($3117 vs $1264; flagship vs premium cost classes). Pick Kimi K3.1 Pro when the extra intelligence is worth the premium, otherwise Mistral Medium 3.5.
| Metric | Kimi K3.1 Pro | Mistral Medium 3.5 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 55.1 | 14.2 | −74.2% Mistral Medium 3.5 is 74.2% less intelligent |
| Total AA cost (lower is better) | $3,117.31 | $1,263.80 | −59.5% Mistral Medium 3.5 is 59.5% cheaper |
| End-to-end time (lower is better) | 42.64s | 17.96s | −57.9% Mistral Medium 3.5 is 57.9% faster |
| Price per 1M tokens (in / out) | $2.00 / $10.0 | $1.50 / $7.50 | |
| Input modalities | Text, Image | Text, Image |
Mistral Medium 3.5 vs Kimi K3.1 Pro: 74.2% less intelligence, 59.5% less cost to run the AA benchmark, and 57.9% 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 Medium 3.5 is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
Kimi K3.1 ProMistral Medium 3.5Today'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-medium-3-5 · Markdown: /api/v1/compare/kimi-k3-1-pro/mistral-medium-3-5?format=md · llms.txt · agent skill