GPT-5.5 (High) vs Nemotron 3 Ultra 550B A55B (Reasoning)
Which is better for the money: GPT-5.5 (High) by OpenAI 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
GPT-5.5 (High) scores 14.1 points higher (37.0 vs 22.9) but costs 5.3× as much to run the benchmark ($3181 vs $596; flagship vs premium cost classes). They are not alternatives at one budget: pick GPT-5.5 (High) when you need intelligence above 22.9, and Nemotron 3 Ultra 550B A55B (Reasoning) when 22.9 is enough.
| Metric | GPT-5.5 (High) | Nemotron 3 Ultra 550B A55B (Reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 37.0 | 22.9 | −38.1% Nemotron 3 Ultra 550B… is 38.1% less intelligent |
| Total AA cost (lower is better) | $3,181.05 | $596.33 | −81.3% Nemotron 3 Ultra 550B… is 81.3% cheaper |
| End-to-end time (lower is better) | 27.27s | 14.75s | −45.9% Nemotron 3 Ultra 550B… is 45.9% faster |
| Price per 1M tokens (in / out) | $5.00 / $30.0 | $0.60 / $2.70 | |
| Input modalities | Text, Image | Text |
Nemotron 3 Ultra 550B A55B (Reasoning) vs GPT-5.5 (High): 38.1% less intelligence, 81.3% less cost to run the AA benchmark, and 45.9% faster end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.5 (High) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
- 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.
GPT-5.5 (High)Nemotron 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/gpt-5-5-high/nvidia-nemotron-3-ultra-550b-a55b · Markdown: /api/v1/compare/gpt-5-5-high/nvidia-nemotron-3-ultra-550b-a55b?format=md · llms.txt · agent skill