GPT-5.5 (Medium) vs Nemotron 3 Ultra 550B A55B (Reasoning)
Which is better for the money: GPT-5.5 (Medium) 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 (Medium) scores 10.9 points higher (33.8 vs 22.9) but costs 3.1× as much to run the benchmark ($1833 vs $596; both premium class). They are not alternatives at one budget: pick GPT-5.5 (Medium) when you need intelligence above 22.9, and Nemotron 3 Ultra 550B A55B (Reasoning) when 22.9 is enough.
| Metric | GPT-5.5 (Medium) | Nemotron 3 Ultra 550B A55B (Reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 33.8 | 22.9 | −32.2% Nemotron 3 Ultra 550B… is 32.2% less intelligent |
| Total AA cost (lower is better) | $1,833.39 | $596.33 | −67.5% Nemotron 3 Ultra 550B… is 67.5% cheaper |
| End-to-end time (lower is better) | 12.23s | 15.29s | +25.0% Nemotron 3 Ultra 550B… is 25.0% slower |
| 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 (Medium): 32.2% less intelligence, 67.5% less cost to run the AA benchmark, and 25.0% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.5 (Medium) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
- 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 (Medium)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-medium/nvidia-nemotron-3-ultra-550b-a55b · Markdown: /api/v1/compare/gpt-5-5-medium/nvidia-nemotron-3-ultra-550b-a55b?format=md · llms.txt · agent skill