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Muse Spark 1.2 vs Nemotron 3 Ultra (550B A55B)

Muse Spark 1.2 leads the LLM Stats Score 41.1 to 37.0.

Meta · NVIDIA · Updated for 2026

Which is better?

Muse Spark 1.2 leads the overall LLM Stats Score 41.1 to 37.0, ranking #44 overall.

In the 1 individual benchmarks reported for both models, Muse Spark 1.2 wins 1; 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 Muse Spark 1.2

  • overall performance matters — it scores 41.1 and ranks #44 on LLM Stats
  • your work emphasizes coding and agents — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 1 of 1 exact shared results
  • you want the most recent training data — it shipped Aug 2026

Choose Nemotron 3 Ultra (550B A55B)

  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Muse Spark 1.2
Meta
Nemotron 3 Ultra (550B A55B)
NVIDIA
Core performance indexes
LLM Stats Score
41.1
#44
37.0
#63
Reasoning
34.4
#80
36.3
#67
Coding
33.3
#35
22.1
#72
Agents
29.3
#31
13.4
#86
Cost, coverage & limits
Benchmark wins
1 of 1
0 of 1
Input price
$0.10 / M
— / M
Output price
$0.20 / M
— / M
Context window
1,048,576
—

Individual benchmarks

3 reported for Muse Spark 1.2 · 26 for Nemotron 3 Ultra (550B A55B)

1 shared

Muse Spark 1.2 outperforms in 1 benchmarks (Terminal-Bench 2.1), while Nemotron 3 Ultra (550B A55B) is better at 0 benchmarks.

Muse Spark 1.2 significantly outperforms across most benchmarks.

Fri Aug 28 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Muse Spark 1.2 specifies input context (1,048,576 tokens). Only Muse Spark 1.2 specifies output context (131,072 tokens).

Meta
Muse Spark 1.2
Input1,048,576 tokens
Output131,072 tokens
NVIDIA
Nemotron 3 Ultra (550B A55B)
Input- tokens
Output- tokens
Fri Aug 28 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Muse Spark 1.2 supports multimodal inputs, whereas Nemotron 3 Ultra (550B A55B) does not.

Muse Spark 1.2 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Muse Spark 1.2

Text
Images
Audio
Video

Nemotron 3 Ultra (550B A55B)

Text
Images
Audio
Video

License

Usage and distribution terms

Muse Spark 1.2 is licensed under a proprietary license, 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.

Muse Spark 1.2

Proprietary

Closed source

Nemotron 3 Ultra (550B A55B)

OpenMDW License v1.1

Open weights

Release Timeline

When each model was launched

Muse Spark 1.2 was released on 2026-08-05, while Nemotron 3 Ultra (550B A55B) was released on 2026-06-04.

Muse Spark 1.2 is 2 months newer than Nemotron 3 Ultra (550B A55B).

Muse Spark 1.2

Aug 5, 2026

3 weeks ago

2mo newer
Nemotron 3 Ultra (550B A55B)

Jun 4, 2026

2 months ago

Knowledge Cutoff

When training data ends

Nemotron 3 Ultra (550B A55B) has a documented knowledge cutoff of 2025-09-30, while Muse Spark 1.2'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 Muse Spark 1.2's cutoff date.

Muse Spark 1.2

—

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 Muse Spark 1.2 and Nemotron 3 Ultra (550B A55B) side-by-side, then vote on the output you prefer.

Muse Spark 1.2
✓ Preferred
Nemotron 3 Ultra (550B A55B)
Open in Playground

FAQ

Common questions about Muse Spark 1.2 vs Nemotron 3 Ultra (550B A55B).

Which is better, Muse Spark 1.2 or Nemotron 3 Ultra (550B A55B)?

Muse Spark 1.2 leads the LLM Stats Score 41.1 to 37.0. Muse Spark 1.2 is made by Meta 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 Muse Spark 1.2 compare to Nemotron 3 Ultra (550B A55B) in benchmarks?

Muse Spark 1.2 scores Terminal-Bench 2.1: 82.9%, Meta Internal Coding Bench: 70.6%, DeepSWE 1.1: 59.3%. 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 Muse Spark 1.2 and Nemotron 3 Ultra (550B A55B)?

Muse Spark 1.2 supports 1.0M tokens and Nemotron 3 Ultra (550B A55B) supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Muse Spark 1.2 and Nemotron 3 Ultra (550B A55B)?

Key differences include LLM Stats Score (41.1 vs 37.0), multimodal support (yes vs no), licensing (Proprietary vs OpenMDW License v1.1). See the full comparison above for benchmark-by-benchmark results.

Who makes Muse Spark 1.2 and Nemotron 3 Ultra (550B A55B)?

Muse Spark 1.2 is developed by Meta and Nemotron 3 Ultra (550B A55B) is developed by NVIDIA.

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