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Head-to-head comparison

Nemotron 3 Ultra vs GPT-5.4 Nano

Nemotron 3 Ultra (NVIDIA) and GPT-5.4 Nano (OpenAI) 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 17 August 2026

As of 17 August 2026, Nemotron 3 Ultra holds the stronger ModelCap Index position (#43 vs #46); GPT-5.4 Nano is 2.9× cheaper per output token ($1.25/1M vs $3.60/1M); and Nemotron 3 Ultra offers the longer context window (512K vs 400K tokens).

Which should you choose?

Choose Nemotron 3 Ultra if…

  • you want the stronger overall ModelCap Index position — #43 against #46 (52.9 vs 52.1 points).
  • you need the longer context window — 512K tokens against 400K.
  • you want provider choice — 4 listed API providers against 2.
  • you want the more recently listed model — Nemotron 3 Ultra was listed 4 June 2026, GPT-5.4 Nano 17 March 2026.

Choose GPT-5.4 Nano if…

  • API cost matters — $1.25/1M output tokens against $3.60/1M, about 2.9× cheaper.
  • your workload is prompt-heavy — input tokens cost $0.20/1M against $0.60/1M.
  • Artificial Analysis Intelligence Index is your yardstick — 39.7 against 38.3.

Nemotron 3 Ultra vs GPT-5.4 Nano: specs, pricing and context

Specification comparison of Nemotron 3 Ultra and GPT-5.4 Nano
FieldNemotron 3 UltraNVIDIAGPT-5.4 NanoOpenAI
ModelCap Index position#43#46
Index score52.952.1
EvidenceMeasuredMeasured
Input price / 1M tokens$0.60$0.20
Output price / 1M tokens$3.60$1.25
Context window512K tokens400K tokens
Max output tokens203K128K
API providers listed42
Weight accessRestricted licenseAPI only
Input modalitiesTextFile, Image, Text
First listed4 June 202617 March 2026
PublisherNVIDIAOpenAI

Evidence: 2 public benchmark observations across 2 boards · 4 public benchmark observations across 4 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Nemotron 3 Ultra vs GPT-5.4 Nano

Public benchmark boards where Nemotron 3 Ultra or GPT-5.4 Nano has a published result
BoardNemotron 3 UltraGPT-5.4 NanoLeads
Arena codingArena (LMArena)—14601454–1466HighOnly one result
LMArena AgentLMArena-14.6%-17.2%–-12.1%—Only one result
ARC-AGI-2ARC Prize Foundation—5.7%X-HighOnly one result
Artificial Analysis Intelligence IndexArtificial Analysis38.3intelligence-index39.7intelligence-indexGPT-5.4 Nano

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 Ultra vs GPT-5.4 Nano: common questions

Is Nemotron 3 Ultra better than GPT-5.4 Nano?

Nemotron 3 Ultra ranks higher on the ModelCap Index as of 17 August 2026: #43 against #46. 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.

Is Nemotron 3 Ultra cheaper than GPT-5.4 Nano?

GPT-5.4 Nano is cheaper on output tokens: $1.25/1M against $3.60/1M. Input tokens are $0.60/1M for Nemotron 3 Ultra and $0.20/1M for GPT-5.4 Nano. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens.

Which has the bigger context window, Nemotron 3 Ultra or GPT-5.4 Nano?

Nemotron 3 Ultra has the larger context window: 512K tokens against 400K.

Which is better for coding, Nemotron 3 Ultra or GPT-5.4 Nano?

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 Ultra and GPT-5.4 Nano open-weight models?

Nemotron 3 Ultra: Restricted license. GPT-5.4 Nano: API only. 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 Ultra and GPT-5.4 Nano?

ModelCap currently lists 4 API providers for Nemotron 3 Ultra and 2 for GPT-5.4 Nano, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Nemotron 3 Ultra vs GPT-5.4 Nano comparison?

Every figure comes from the sealed ModelCap dataset published 17 August 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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