Kimi K3.1 Pro vs Nemotron 3 Ultra 550B A55B (Reasoning)
Which is better for the money: Kimi K3.1 Pro by Kimi or Nemotron 3 Ultra 550B A55B (Reasoning) by NVIDIA? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-27.
Trade-off
Verdict
Depends on your budget
Kimi K3.1 Pro scores 32.2 points higher (55.1 vs 22.9) but costs 5.2× as much to run the benchmark ($3117 vs $596; flagship vs premium cost classes). They are not alternatives at one budget: pick Kimi K3.1 Pro when you need intelligence above 22.9, and Nemotron 3 Ultra 550B A55B (Reasoning) when 22.9 is enough.
| Metric | Kimi K3.1 Pro | Nemotron 3 Ultra 550B A55B (Reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 55.1 | 22.9 | −58.4% Nemotron 3 Ultra 550B… is 58.4% less intelligent |
| Total AA cost (lower is better) | $3,117.31 | $596.33 | −80.9% Nemotron 3 Ultra 550B… is 80.9% cheaper |
| End-to-end time (lower is better) | 59.28s | 15.29s | −74.2% Nemotron 3 Ultra 550B… is 74.2% faster |
| Price per 1M tokens (in / out) | $2.00 / $10.0 | $0.60 / $2.70 | |
| Input modalities | Text, Image | Text |
Nemotron 3 Ultra 550B A55B (Reasoning) vs Kimi K3.1 Pro: 58.4% less intelligence, 80.9% less cost to run the AA benchmark, and 74.2% 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.
- Nemotron 3 Ultra 550B A55B (Reasoning) is off the frontier: at the same or lower cost, GPT-6.1 Sol (High) scores 50.20 for $521.
Kimi K3.1 ProNemotron 3 Ultra 550B A55B (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/nvidia-nemotron-3-ultra-550b-a55b · Markdown: /api/v1/compare/kimi-k3-1-pro/nvidia-nemotron-3-ultra-550b-a55b?format=md · llms.txt · agent skill