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Head-to-head comparison

Nemotron 3.5 Lightning vs Nemotron 3 Labs Ultra Math RL

Nemotron 3.5 Lightning (NVIDIA) and Nemotron 3 Labs Ultra Math RL (NVIDIA) compared on the ModelCap Index, API price, context window, provider availability, weight access and every public benchmark board they share. Figures are the same ones shown on the live rankings; nothing here is a hidden score.

Snapshot as of 9 September 2026

As of 9 September 2026, Nemotron 3 Labs Ultra Math RL holds the stronger ModelCap Index position (#55 vs #89).

Which should you choose?

Choose Nemotron 3.5 Lightning if…

  • you want provider choice — 2 listed API providers against 0.

Choose Nemotron 3 Labs Ultra Math RL if…

  • you want the stronger overall ModelCap Index position — #55 against #89 (56.3 vs 44.0 points).
  • you want the more recently listed model — Nemotron 3 Labs Ultra Math RL was listed 2 September 2026, Nemotron 3.5 Lightning 11 August 2026.

Nemotron 3.5 Lightning vs Nemotron 3 Labs Ultra Math RL: specs, pricing and context

Specification comparison of Nemotron 3.5 Lightning and Nemotron 3 Labs Ultra Math RL
FieldNemotron 3.5 LightningNVIDIANemotron 3 Labs Ultra Math RLNVIDIA
ModelCap Index position#89#55
Index score44.056.3
EvidenceMeasuredInherited
Input price / 1M tokens$0.08Unlisted
Output price / 1M tokens$0.20Unlisted
Context window262K tokens— tokens
Max output tokens131K—
API providers listed20
Weight accessRestricted licenseRestricted license
Input modalitiesTextText
First listed11 August 20262 September 2026
PublisherNVIDIANVIDIA

Evidence: 1 public benchmark observation across 1 board · finetune of nvidia/nemotron-3-ultra-550b-a55b · bf16 (100%). Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Nemotron 3.5 Lightning vs Nemotron 3 Labs Ultra Math RL

Public benchmark boards where Nemotron 3.5 Lightning or Nemotron 3 Labs Ultra Math RL has a published result
BoardNemotron 3.5 LightningNemotron 3 Labs Ultra Math RLLeads
AA Intelligence IndexArtificial Analysis13.6intelligence-index:v4.3:reasoning-unspecified—Only one result
AA Terminal-Bench 2.1Artificial Analysis24.3%terminal-bench:2.1:terminus-2:e2b:pass-at-1:3-repeats:source-model="Nemotron 3.5 Lightning":reasoning=true—Only one result
AA Humanity's Last ExamArtificial Analysis10.6%hle:may-2025:text-only-2158:no-tools:pass-at-1:source-model="Nemotron 3.5 Lightning":reasoning=true—Only one result

Scores are the sources' own published figures for each model's best evaluated configuration; ModelCap never re-runs a benchmark.

Want a different pairing? Open the interactive comparison tool to swap either model for any current ranked language model.

Nemotron 3.5 Lightning vs Nemotron 3 Labs Ultra Math RL: common questions

Is Nemotron 3.5 Lightning better than Nemotron 3 Labs Ultra Math RL?

Nemotron 3 Labs Ultra Math RL ranks higher on the ModelCap Index as of 9 September 2026: #55 against #89. That is a capability ranking built from public benchmark evidence with published uncertainty; whether it is "better" for you also depends on price, context and where you can run it. Their published uncertainty intervals overlap, so the rank difference alone does not establish a reliable capability advantage for your workload.

Is Nemotron 3.5 Lightning cheaper than Nemotron 3 Labs Ultra Math RL?

At least one of the two has no listed API price on ModelCap right now, so no price comparison is made.

Which has the bigger context window, Nemotron 3.5 Lightning or Nemotron 3 Labs Ultra Math RL?

Both publish a 262K-token context window.

Which is better for coding, Nemotron 3.5 Lightning or Nemotron 3 Labs Ultra Math RL?

The two models do not share a coding benchmark board on ModelCap yet, so no head-to-head coding score is published; the ModelCap Index position is the closest overall signal.

Are Nemotron 3.5 Lightning and Nemotron 3 Labs Ultra Math RL open-weight models?

Nemotron 3.5 Lightning: Restricted license. Nemotron 3 Labs Ultra Math RL: Restricted license. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.

Where can I run Nemotron 3.5 Lightning and Nemotron 3 Labs Ultra Math RL?

ModelCap currently lists 2 API providers for Nemotron 3.5 Lightning and 0 for Nemotron 3 Labs Ultra Math RL, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Nemotron 3.5 Lightning vs Nemotron 3 Labs Ultra Math RL comparison?

Every figure comes from the sealed ModelCap dataset published 9 September 2026; the page re-renders within a minute of each data refresh, and the ModelCap Index positions are the same ones shown on the live rankings.

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