Model Comparison

Muse Spark 1.1 vs Nemotron 3 Ultra (550B A55B)Which is better in 2026?

Muse Spark 1.1 significantly outperforms across most benchmarks.

Verdict: Muse Spark 1.1 vs Nemotron 3 Ultra (550B A55B) — which is better?

Muse Spark 1.1 (by Meta) and Nemotron 3 Ultra (550B A55B) (by NVIDIA) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Muse Spark 1.1 outperforms in 3 benchmarks (Finance Agent v2, Humanity's Last Exam, Terminal-Bench 2.1), while Nemotron 3 Ultra (550B A55B) is better at 0 benchmarks. Muse Spark 1.1 significantly outperforms across most benchmarks.

Choose Muse Spark 1.1 if…

  • you want the strongest raw capability — it leads on 3 of 3 shared benchmarks
  • you want the most recent training data — it shipped Jul 2026

Choose Nemotron 3 Ultra (550B A55B) if…

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

Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Muse Spark 1.1 outperforms in 3 benchmarks (Finance Agent v2, Humanity's Last Exam, Terminal-Bench 2.1), while Nemotron 3 Ultra (550B A55B) is better at 0 benchmarks.

Muse Spark 1.1 significantly outperforms across most benchmarks.

Fri Jul 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Input Capabilities

Supported data types and modalities

Muse Spark 1.1 supports multimodal inputs, whereas Nemotron 3 Ultra (550B A55B) does not.

Muse Spark 1.1 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Muse Spark 1.1

Text
Images
Audio
Video

Nemotron 3 Ultra (550B A55B)

Text
Images
Audio
Video

License

Usage and distribution terms

Muse Spark 1.1 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 1.1

Proprietary

Closed source

Nemotron 3 Ultra (550B A55B)

OpenMDW License v1.1

Open weights

Release Timeline

When each model was launched

Muse Spark 1.1 was released on 2026-07-09, while Nemotron 3 Ultra (550B A55B) was released on 2026-06-04.

Muse Spark 1.1 is 1 month newer than Nemotron 3 Ultra (550B A55B).

Muse Spark 1.1

Jul 9, 2026

1 weeks ago

1mo newer
Nemotron 3 Ultra (550B A55B)

Jun 4, 2026

1 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 1.1'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 1.1's cutoff date.

Muse Spark 1.1

—

Nemotron 3 Ultra (550B A55B)

Sep 2025

Outputs Comparison

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Key Takeaways

Meta
Supports multimodal inputs
Higher Finance Agent v2 score (57.2% vs 37.5%)
Higher Humanity's Last Exam score (62.1% vs 37.4%)
Higher Terminal-Bench 2.1 score (80.0% vs 56.4%)
NVIDIA
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Muse Spark 1.1 and Nemotron 3 Ultra (550B A55B) side-by-side, then vote on the output you prefer.

Muse Spark 1.1
✓ Preferred
Nemotron 3 Ultra (550B A55B)
Open in Playground
AI Model Comparison Table
Feature
Meta
Muse Spark 1.1
NVIDIA
Nemotron 3 Ultra (550B A55B)

FAQ

Common questions about Muse Spark 1.1 vs Nemotron 3 Ultra (550B A55B).

Which is better, Muse Spark 1.1 or Nemotron 3 Ultra (550B A55B)?

Muse Spark 1.1 significantly outperforms across most benchmarks. Muse Spark 1.1 is made by Meta and Nemotron 3 Ultra (550B A55B) is made by NVIDIA. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Muse Spark 1.1 compare to Nemotron 3 Ultra (550B A55B) in benchmarks?

Muse Spark 1.1 scores CharXiv-R: 88.4%, MCP Atlas: 88.1%, OSWorld-Verified: 80.8%, Terminal-Bench 2.1: 80.0%, BabyVision: 76.3%. 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 main differences between Muse Spark 1.1 and Nemotron 3 Ultra (550B A55B)?

Key differences include 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 1.1 and Nemotron 3 Ultra (550B A55B)?

Muse Spark 1.1 is developed by Meta and Nemotron 3 Ultra (550B A55B) is developed by NVIDIA.

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