LongCat 2.0 vs Nemotron 3 Ultra 550B A55B (Reasoning)
Which is better for the money: LongCat 2.0 by LongCat 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
Nemotron 3 Ultra 550B A55B (Reasoning) scores 3.8 points higher (22.9 vs 19.1) but costs 1.1× as much to run the benchmark ($596 vs $545; both premium class). Pick Nemotron 3 Ultra 550B A55B (Reasoning) when the extra intelligence is worth the premium, otherwise LongCat 2.0.
| Metric | LongCat 2.0 | Nemotron 3 Ultra 550B A55B (Reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 19.1 | 22.9 | +19.9% Nemotron 3 Ultra 550B… is 19.9% more intelligent |
| Total AA cost (lower is better) | $544.74 | $596.33 | +9.5% Nemotron 3 Ultra 550B… is 9.5% more expensive |
| End-to-end time (lower is better) | 37.46s | 15.23s | −59.3% Nemotron 3 Ultra 550B… is 59.3% faster |
| Price per 1M tokens (in / out) | $0.75 / $2.95 | $0.60 / $2.70 | |
| Input modalities | Text | Text |
Nemotron 3 Ultra 550B A55B (Reasoning) vs LongCat 2.0: 19.9% more intelligence, 9.5% more cost to run the AA benchmark, and 59.3% faster end-to-end.
Today's Pareto frontier
Against the frontier
- LongCat 2.0 is off the frontier: at the same or lower cost, GPT-6.1 Sol (High) scores 50.20 for $521.
- 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.
LongCat 2.0Nemotron 3 Ultra 550B A55B (Reasoning)Today's Pareto frontierOpen-weights frontierEvery other model
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