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Atria Dawn Preview vs Nemotron 3 Ultra (550B A55B)

Atria Dawn Preview leads the LLM Stats Score 52.3 to 36.3.

Shanghai AI Laboratory · NVIDIA · Updated for 2026

Which is better?

Atria Dawn Preview leads the overall LLM Stats Score 52.3 to 36.3, ranking #10 overall.

In the 2 individual benchmarks reported for both models, Atria Dawn Preview wins 2; this is a narrower head-to-head signal than the composite indexes.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Atria Dawn Preview

  • overall performance matters — it scores 52.3 and ranks #10 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 2 of 2 exact shared results
  • you want the most recent training data — it shipped Sep 2026

Choose Nemotron 3 Ultra (550B A55B)

  • you want predictable pricing at $0.50/M input and $2.20/M output

At a glance

The differences that matter most.

Atria Dawn Preview
Shanghai AI Laboratory
Nemotron 3 Ultra (550B A55B)
NVIDIA
Core performance indexes
LLM Stats Score
52.3
#10
36.3
#79
Reasoning
50.5
#12
35.4
#82
Coding
36.2
#22
21.0
#93
Agents
38.8
#10
12.5
#101
Cost, coverage & limits
Benchmark wins
2 of 2
0 of 2
Input price
— / M
$0.50 / M
Output price
— / M
$2.20 / M
Context window
—
262,144

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Atria Dawn Preview
Nemotron 3 Ultra (550B A55B)
Tool use
31.1#12
2.8#166
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

12 reported for Atria Dawn Preview · 26 for Nemotron 3 Ultra (550B A55B)

2 shared

Atria Dawn Preview outperforms in 2 benchmarks (BrowseComp, Terminal-Bench 2.1), while Nemotron 3 Ultra (550B A55B) is better at 0 benchmarks.

Atria Dawn Preview significantly outperforms across most benchmarks.

Sun Sep 20 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Model Size

Parameter count comparison

194.0B diff

Atria Dawn Preview has 194.0B more parameters than Nemotron 3 Ultra (550B A55B), making it 35.3% larger.

Shanghai AI Laboratory
Atria Dawn Preview
744.0Bparameters
NVIDIA
Nemotron 3 Ultra (550B A55B)
550.0Bparameters
744.0B
Atria Dawn Preview
550.0B
Nemotron 3 Ultra (550B A55B)

Context Window

Maximum input and output token capacity

Only Nemotron 3 Ultra (550B A55B) specifies input context (262,144 tokens). Only Nemotron 3 Ultra (550B A55B) specifies output context (262,144 tokens).

Shanghai AI Laboratory
Atria Dawn Preview
Input- tokens
Output- tokens
NVIDIA
Nemotron 3 Ultra (550B A55B)
Input262,144 tokens
Output262,144 tokens
Sun Sep 20 2026 • llm-stats.com

License

Usage and distribution terms

Atria Dawn Preview is licensed under MIT, while Nemotron 3 Ultra (550B A55B) uses OpenMDW License v1.1.

License differences may affect how you can use these models in commercial or open-source projects.

Atria Dawn Preview

MIT

Open weights

Nemotron 3 Ultra (550B A55B)

OpenMDW License v1.1

Open weights

Release Timeline

When each model was launched

Atria Dawn Preview was released on 2026-09-11, while Nemotron 3 Ultra (550B A55B) was released on 2026-06-04.

Atria Dawn Preview is 3 months newer than Nemotron 3 Ultra (550B A55B).

Atria Dawn Preview

Sep 11, 2026

1 weeks ago

3mo newer
Nemotron 3 Ultra (550B A55B)

Jun 4, 2026

3 months ago

Knowledge Cutoff

When training data ends

Nemotron 3 Ultra (550B A55B) has a documented knowledge cutoff of 2025-09-30, while Atria Dawn Preview's cutoff date is not specified.

We can confirm Nemotron 3 Ultra (550B A55B)'s training data extends to 2025-09-30, but cannot make a direct comparison without Atria Dawn Preview's cutoff date.

Atria Dawn Preview

—

Nemotron 3 Ultra (550B A55B)

Sep 2025

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Atria Dawn Preview and Nemotron 3 Ultra (550B A55B) side-by-side, then vote on the output you prefer.

Atria Dawn Preview
✓ Preferred
Nemotron 3 Ultra (550B A55B)
Open in Playground

FAQ

Common questions about Atria Dawn Preview vs Nemotron 3 Ultra (550B A55B).

Which is better, Atria Dawn Preview or Nemotron 3 Ultra (550B A55B)?

Atria Dawn Preview leads the LLM Stats Score 52.3 to 36.3. Atria Dawn Preview is made by Shanghai AI Laboratory and Nemotron 3 Ultra (550B A55B) is made by NVIDIA. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Atria Dawn Preview compare to Nemotron 3 Ultra (550B A55B) in benchmarks?

Atria Dawn Preview scores DeepSearchQA: 96.0%, BrowseComp: 92.5%, CyberGym: 86.5%, MLE-Bench Lite: 86.2%, WideSearch: 81.9%. Nemotron 3 Ultra (550B A55B) scores RULER: 94.7%, IMO-AnswerBench: 92.3%, PinchBench: 90.0%, LiveCodeBench v6: 89.0%, GPQA: 87.0%.

What are the context window sizes for Atria Dawn Preview and Nemotron 3 Ultra (550B A55B)?

Atria Dawn Preview supports an unknown number of tokens and Nemotron 3 Ultra (550B A55B) supports 262K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Atria Dawn Preview and Nemotron 3 Ultra (550B A55B)?

Key differences include LLM Stats Score (52.3 vs 36.3), licensing (MIT vs OpenMDW License v1.1). See the full comparison above for benchmark-by-benchmark results.

Who makes Atria Dawn Preview and Nemotron 3 Ultra (550B A55B)?

Atria Dawn Preview is developed by Shanghai AI Laboratory and Nemotron 3 Ultra (550B A55B) is developed by NVIDIA.

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