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Muse Spark 1.3 vs Nemotron 3 Ultra (550B A55B)

Muse Spark 1.3 leads the LLM Stats Score 54.3 to 36.3. Nemotron 3 Ultra (550B A55B) is 2.2x cheaper per token.

Meta · NVIDIA · Updated for 2026

Which is better?

Muse Spark 1.3 leads the overall LLM Stats Score 54.3 to 36.3, ranking #6 overall.

In the 1 individual benchmarks reported for both models, Muse Spark 1.3 wins 1; this is a narrower head-to-head signal than the composite indexes.

On price, Nemotron 3 Ultra (550B A55B) is roughly 2.2x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Muse Spark 1.3 also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

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

Choose Muse Spark 1.3

  • overall performance matters — it scores 54.3 and ranks #6 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 1 of 1 exact shared results
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Sep 2026

Choose Nemotron 3 Ultra (550B A55B)

  • cost matters — it's about 2.2x cheaper per token
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Muse Spark 1.3
Meta
Nemotron 3 Ultra (550B A55B)
NVIDIA
Core performance indexes
LLM Stats Score
54.3
#6
36.3
#79
Reasoning
51.8
#7
35.4
#82
Coding
41.8
#10
21.0
#92
Agents
40.1
#6
12.5
#101
Cost, coverage & limits
Benchmark wins
1 of 1
0 of 1
Input price
$1.25 / M
$0.50 / M
Output price
$4.25 / M
$2.20 / M
Context window
1,048,576
262,144

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Muse Spark 1.3
Nemotron 3 Ultra (550B A55B)
Tool use
33.7#4
2.8#166
Long context
31.9#1
23.3#20
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

11 reported for Muse Spark 1.3 · 26 for Nemotron 3 Ultra (550B A55B)

1 shared

Muse Spark 1.3 outperforms in 1 benchmarks (Terminal-Bench 2.1), while Nemotron 3 Ultra (550B A55B) is better at 0 benchmarks.

Muse Spark 1.3 significantly outperforms across most benchmarks.

Sun Sep 20 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Nemotron 3 Ultra (550B A55B) costs less

For input processing, Muse Spark 1.3 ($1.25/1M tokens) is 2.5x more expensive than Nemotron 3 Ultra (550B A55B) ($0.50/1M tokens).

For output processing, Muse Spark 1.3 ($4.25/1M tokens) is 1.9x more expensive than Nemotron 3 Ultra (550B A55B) ($2.20/1M tokens).

In conclusion, Muse Spark 1.3 is more expensive than Nemotron 3 Ultra (550B A55B).*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Sun Sep 20 2026 • llm-stats.com
Meta
Muse Spark 1.3
Input tokens$1.25
Output tokens$4.25
Best providerMeta
NVIDIA
Nemotron 3 Ultra (550B A55B)
Input tokens$0.50
Output tokens$2.20
Best providerDeepinfra
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Muse Spark 1.3 accepts 1,048,576 input tokens compared to Nemotron 3 Ultra (550B A55B)'s 262,144 tokens. Muse Spark 1.3 can generate longer responses up to 943,718 tokens, while Nemotron 3 Ultra (550B A55B) is limited to 262,144 tokens.

Meta
Muse Spark 1.3
Input1,048,576 tokens
Output943,718 tokens
NVIDIA
Nemotron 3 Ultra (550B A55B)
Input262,144 tokens
Output262,144 tokens
Sun Sep 20 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Muse Spark 1.3 supports multimodal inputs, whereas Nemotron 3 Ultra (550B A55B) does not.

Muse Spark 1.3 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Muse Spark 1.3

Text
Images
Audio
Video

Nemotron 3 Ultra (550B A55B)

Text
Images
Audio
Video

License

Usage and distribution terms

Muse Spark 1.3 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 1.3

Proprietary

Closed source

Nemotron 3 Ultra (550B A55B)

OpenMDW License v1.1

Open weights

Release Timeline

When each model was launched

Muse Spark 1.3 was released on 2026-09-02, while Nemotron 3 Ultra (550B A55B) was released on 2026-06-04.

Muse Spark 1.3 is 3 months newer than Nemotron 3 Ultra (550B A55B).

Muse Spark 1.3

Sep 2, 2026

2 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 Muse Spark 1.3'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 1.3's cutoff date.

Muse Spark 1.3

—

Nemotron 3 Ultra (550B A55B)

Sep 2025

Provider Availability

Muse Spark 1.3 is available from Meta Model API. Nemotron 3 Ultra (550B A55B) is available from DeepInfra.

Muse Spark 1.3

meta logo
Meta
Input Price:Input: $1.25/1MOutput Price:Output: $4.25/1M

Nemotron 3 Ultra (550B A55B)

deepinfra logo
Deepinfra
Input Price:Input: $0.50/1MOutput Price:Output: $2.20/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Muse Spark 1.3 and Nemotron 3 Ultra (550B A55B) side-by-side, then vote on the output you prefer.

Muse Spark 1.3
✓ Preferred
Nemotron 3 Ultra (550B A55B)
Open in Playground

FAQ

Common questions about Muse Spark 1.3 vs Nemotron 3 Ultra (550B A55B).

Which is better, Muse Spark 1.3 or Nemotron 3 Ultra (550B A55B)?

Muse Spark 1.3 leads the LLM Stats Score 54.3 to 36.3. Muse Spark 1.3 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 1.3 compare to Nemotron 3 Ultra (550B A55B) in benchmarks?

Muse Spark 1.3 scores MRCR v2 (8-needle): 98.5%, MRCR v2 (8-needle, 512K-1M): 98.1%, DeepSearchQA: 89.4%, Terminal-Bench 2.1: 88.8%, DeepSWE 1.1: 75.4%. Nemotron 3 Ultra (550B A55B) scores RULER: 94.7%, IMO-AnswerBench: 92.3%, PinchBench: 90.0%, LiveCodeBench v6: 89.0%, GPQA: 87.0%.

Is Muse Spark 1.3 cheaper than Nemotron 3 Ultra (550B A55B)?

Nemotron 3 Ultra (550B A55B) is 2.5x cheaper for input tokens. Muse Spark 1.3 costs $1.25/M input and $4.25/M output via meta. Nemotron 3 Ultra (550B A55B) costs $0.50/M input and $2.20/M output via deepinfra.

What are the context window sizes for Muse Spark 1.3 and Nemotron 3 Ultra (550B A55B)?

Muse Spark 1.3 supports 1.0M 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 Muse Spark 1.3 and Nemotron 3 Ultra (550B A55B)?

Key differences include LLM Stats Score (54.3 vs 36.3), context window (1.0M vs 262K), input pricing ($1.25 vs $0.50/M), 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 1.3 and Nemotron 3 Ultra (550B A55B)?

Muse Spark 1.3 is developed by Meta and Nemotron 3 Ultra (550B A55B) is developed by NVIDIA.

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