GPT-6 Luna (Medium) vs Nemotron 3 Ultra 550B A55B (Reasoning)
Which is better for the money: GPT-6 Luna (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.
Clear winner
Verdict
Pick GPT-6 Luna (Medium)
Nemotron 3 Ultra 550B A55B (Reasoning) vs GPT-6 Luna (Medium): 23.4% less intelligence, 1813.2% more cost to run the AA benchmark, and end-to-end time not fully reported.
| Metric | GPT-6 Luna (Medium) | Nemotron 3 Ultra 550B A55B (Reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 29.9 | 22.9 | −23.4% Nemotron 3 Ultra 550B… is 23.4% less intelligent |
| Total AA cost (lower is better) | $31.17 | $596.33 | +1813.2% Nemotron 3 Ultra 550B… is 19× more expensive |
| End-to-end time (lower is better) | Not reported | 15.29s | — not comparable |
| Price per 1M tokens (in / out) | $0.10 / $0.50 | $0.60 / $2.70 | |
| Input modalities | Text, Image | Text |
Today's Pareto frontier
Against the frontier
- GPT-6 Luna (Medium) 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.
GPT-6 Luna (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-6-luna-medium/nvidia-nemotron-3-ultra-550b-a55b · Markdown: /api/v1/compare/gpt-6-luna-medium/nvidia-nemotron-3-ultra-550b-a55b?format=md · llms.txt · agent skill