# Nemotron 3 Ultra

Nemotron 3 Ultra is an AI model released by NVIDIA on Jun 4 2026. It has 550B parameters and open source. Tracked results include 49% on BullshitBench v2, 86.7% on GPQA Diamond and 71.9% on SWE-Bench Verified.

## Facts

| Field | Value |
| --- | --- |
| Model | Nemotron 3 Ultra |
| Developer | NVIDIA |
| Release date | Thursday, Jun 4 2026 |
| Licensing | Open Source |
| Parameters | 550B |

## Tracked benchmark scores

| Benchmark | Score | Source | What it measures |
| --- | --- | --- | --- |
| BullshitBench v2 | 49% | [BullshitBench](https://github.com/petergpt/bullshit-benchmark) | Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. |
| SWE-Bench Verified | 71.9% | [BenchLM](https://benchlm.ai), retrieved 2026-08-31 | Real coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. |
| Terminal-Bench 2.1 | 56.4% | [BenchLM](https://benchlm.ai), retrieved 2026-09-28 | Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? Higher is better. |
| BrowseComp | 44.4% | [BenchLM](https://benchlm.ai), retrieved 2026-08-31 | Can the AI browse the web and track down hard-to-find answers? Higher is better. |
| Humanity's Last Exam (with tools) | 26.7% | [BenchLM](https://benchlm.ai), retrieved 2026-08-31 | Humanity's Last Exam — extremely hard expert questions across many subjects. “With tools” means the AI is allowed to search the web or run code while answering. Higher is better. |
| GPQA Diamond | 86.7% | Lab | Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. |
| AA Intelligence Index | 48 | Lab | Artificial Analysis composite intelligence index across evals |

## About Nemotron 3 Ultra

Nemotron 3 Ultra, announced at Computex on June 1, 2026 and released with weights on June 4, was NVIDIA's largest published model: 550 billion total parameters with 55 billion active, in the same hybrid Mamba-Transformer mixture-of-experts architecture as its smaller siblings. It completed the Nano/Super/Ultra ladder the company had laid out when the generation opened the previous December.

At release it scored 48 on the Artificial Analysis Intelligence Index — the highest of any US-developed open-weight model at the time, well clear of the previous US leader Gemma 4 31B at 39, though still behind the strongest Chinese open flagships on the same index — alongside 86.7% on GPQA Diamond. NVIDIA leaned on the efficiency argument it had built the family around: over 300 tokens per second on its own hardware and markedly lower per-task cost than the open models above it on the leaderboard.

## Questions and answers

### When was Nemotron 3 Ultra released?

Nemotron 3 Ultra was released by NVIDIA on Thursday, Jun 4 2026.

### Who made Nemotron 3 Ultra?

Nemotron 3 Ultra was built by NVIDIA. The dominant AI chipmaker, publishing the open Nemotron model family. Ships weights, datasets and training recipes to seed demand for its hardware rather than to sell a chatbot.

### What benchmark scores did Nemotron 3 Ultra get?

Nemotron 3 Ultra reports 7 tracked benchmark scores — BullshitBench v2: 49%; SWE-Bench Verified: 71.9%; Terminal-Bench 2.1: 56.4%; BrowseComp: 44.4%; Humanity's Last Exam (with tools): 26.7%; GPQA Diamond: 86.7%; AA Intelligence Index: 48. Tracked scores may come from lab reports or independent benchmarks; source details accompany the benchmark data.

### How many parameters does Nemotron 3 Ultra have?

Nemotron 3 Ultra is reported at 550B parameters.

### Is Nemotron 3 Ultra open source?

Yes. Nemotron 3 Ultra is open source: the model weights are published together with training code and data under an open license, so it can be downloaded, self-hosted, fine-tuned, and in principle reproduced from scratch.

### What came before and after Nemotron 3 Ultra?

NVIDIA's previous tracked release was Nemotron 3 Super on Mar 11 2026, 85 days earlier. It was followed by Nemotron 3.5 Lightning on Aug 11 2026.


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Canonical page: https://aireleasetracker.com/model/nvidia/nemotron-3-ultra
Site index: https://aireleasetracker.com/llms.txt
Source: AI Release Tracker (https://aireleasetracker.com). Most benchmark scores come from lab launch material; gathered results identify the leaderboard that published them.