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Nemotron 3.5 Lightning vs Nemotron 3 Ultra 550B A55B

NVIDIA · released

Wins 0 of 6 areas

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NVIDIA · released

Wins 6 of 6 areas

Coding · Agents · Reasoning · Facts · Long documents · Following instructions

Nemotron 3 Ultra 550B A55B is the stronger all-rounder.Nemotron 3.5 Lightning is cheaper.

Scores updated · 24 tests both models report · How we compare

Where each one wins

Tests won in each of the six areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.

Long documents and following instructions rest on a single test each.

What it costs

Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.

Nemotron 3.5 Lightning$0.06 to read · $0.20 to write$0.26Price from Artificial Analysis
Nemotron 3 Ultra 550B A55B$0.60 to read · $2.50 to write$3.10Price from Artificial Analysis

Nemotron 3.5 Lightning costs 92% less for the same work.

The biggest differences

The tests each model wins by the widest margin, up to three each. Scores are out of 100.

Where Nemotron 3 Ultra 550B A55B pulls ahead

  • Command-line tasks in a real terminalTerminal-Bench 2.1+29.6points aheadNemotron 3 Ultra 550B A55B53.9Nemotron 3.5 Lightning24.3
  • Fixes real GitHub issues in many programming languagesSWE-bench Multilingual+28.4points aheadNemotron 3 Ultra 550B A55B67.7Nemotron 3.5 Lightning39.3
  • Fixes real GitHub issues in Python projectsSWE-bench Verified+19.1points aheadNemotron 3 Ultra 550B A55B70.7Nemotron 3.5 Lightning51.6

Where Nemotron 3.5 Lightning pulls ahead

No clear win on a test scored out of 100.

Every test, side by side

All 24 tests both models report. The winning score is in its model's colour; marks a score checked independently.

CodingNemotron 3 Ultra 550B A55B

Full coding ranking

AgentsNemotron 3 Ultra 550B A55B
  • GDPValNemotron 3 Ultra 550B A55B by 18.8725.8+18.8
  • BrowseCompNemotron 3 Ultra 550B A55B by 7.43744.4+7.4
  • τ-Bench V3 · BankingNemotron 3 Ultra 550B A55B by 5.38.914.2+5.3
  • Terminal-Bench 4.0tie0.50.5tie

Full agents ranking

ReasoningNemotron 3 Ultra 550B A55B

Full reasoning ranking

FactsNemotron 3 Ultra 550B A55B

Full facts ranking

Long documentsNemotron 3 Ultra 550B A55B
  • AA-LCRNemotron 3 Ultra 550B A55B by 1960.379.3+19

Full long documents ranking

Following instructionsNemotron 3 Ultra 550B A55B
  • IFBenchNemotron 3 Ultra 550B A55B by 9.571.981.4+9.5

Full following instructions ranking

Other results9 tests, not counted

Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.

Questions people ask

Which is better, Nemotron 3.5 Lightning or Nemotron 3 Ultra 550B A55B?

Nemotron 3 Ultra 550B A55B wins all six areas where both have results: coding, agents, reasoning, facts, long documents and following instructions. Nemotron 3.5 Lightning wins none, but costs 92% less.

Which is better for coding?

Nemotron 3 Ultra 550B A55B. It wins 4 of the 4 coding tests both models report; Nemotron 3.5 Lightning wins none.

Which is cheaper?

Nemotron 3.5 Lightning costs $0.06 per million input tokens and $0.20 per million output tokens; Nemotron 3 Ultra 550B A55B costs $0.60 and $2.50. That makes Nemotron 3.5 Lightning about 92% cheaper for the same work.

How do you compare the two?

We use the 24 benchmark tests both models have published scores on. The verdict counts the 15 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 9 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.