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Muse Spark 1.3 vs Nemotron 3 Ultra

Muse Spark 1.3 leads Nemotron 3 Ultra on coding, 57.4 to 30.0 on the Vibe Coding Index, and Nemotron 3 Ultra costs 1.8x less per output token ($2.40 vs $4.25 per million). Updated October 22, 2026; 56 benchmarks have a result for both.

Replace Muse Spark 1.3 Replace Nemotron 3 Ultra
Muse Spark 1.3Meta
Coding
57.4
Overall
68.6
Output $/M
$4.25
56
Nemotron 3 UltraNVIDIA
Coding
30.0
Overall
53.1
Output $/M
$2.40
0
vs boards won of 56 shared

Muse Spark 1.3 or Nemotron 3 Ultra: which to pick

Pick Muse Spark 1.3 for coding: it scores 57.4 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra.

Pick Nemotron 3 Ultra for output tokens 1.8x cheaper ($2.40 vs $4.25 per million).

Model AMuse Spark 1.3Meta57.4/1004 independent benchmarksNo cost per solved taskModel BNemotron 3 UltraNVIDIA30.0/1003 independent benchmarksNo cost per solved task
Shared results
56
Muse Spark 1.3 only
40
Nemotron 3 Ultra only
15
Like-for-like categories
8 of 9

Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

At a glance

Coding index
Muse Spark 1.3 57.4 from 4 benchmarks, Nemotron 3 Ultra 30.0 from 3 benchmarks.
Widest category
Agentic work, 29.8 points apart on average over 5 shared benchmarks.
Widest single gap
Vibe Code Bench (Vals AI): Muse Spark 1.3 82.9% against Nemotron 3 Ultra 7.6%, 75.2 points apart on a 0 to 100 scale.
Output price
Muse Spark 1.3 $4.25 against Nemotron 3 Ultra $2.40 per million output tokens, 1.8x apart.
Context window
Muse Spark 1.3 takes 1.05M tokens, Nemotron 3 Ultra 262K.

Benchmark by benchmark

First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.

Boards won, where both have a result
CategoryMuse Spark 1.3BarsNemotron 3 UltraTies
Coding80
Intelligence20
Agentic work50
Reasoning60
Math40
Knowledge40
Web design80
General190
All shared boards560
CodingLike-for-likeSix of these boards feed the Vibe Coding Index80
Coding benchmarks for Muse Spark 1.3 and Nemotron 3 Ultra
BenchmarkMuse Spark 1.3Nemotron 3 UltraLeader
LiveBench coding90.2%Not measuredOnly Muse Spark 1.3 measured
LMArena WebDev1659Not measuredOnly Muse Spark 1.3 measured
AA Coding Index75.849.3Muse Spark 1.3
LiveCodeBench (Vals AI)Not measured86.0%Only Nemotron 3 Ultra measured
SWE-bench Verified (Vals AI)Not measured69.0%Only Nemotron 3 Ultra measured
Terminal-Bench 4 (Vals AI)10.6%Not measuredOnly Muse Spark 1.3 measured
Vibe Code Bench (Vals AI)82.9%7.6%Muse Spark 1.3
Code migration (Vals AI)27.6%4.9%Muse Spark 1.3
ProgramBench (Vals AI)0.5%0.0%Muse Spark 1.3
IOI (Vals AI)43.9%Not measuredOnly Muse Spark 1.3 measured
Terminal-Bench 2.1 (Vals AI)72.3%50.9%Muse Spark 1.3
CyberBench (Vals AI)69.4%Not measuredOnly Muse Spark 1.3 measured
SciCode59.7%40.3%Muse Spark 1.3
Terminal-Bench Hard (Artificial Analysis run)Not measured36.4%Only Nemotron 3 Ultra measured
FrontierCodeNot measured13.6%Only Nemotron 3 Ultra measured
FrontierSWE25.8%Not measuredOnly Muse Spark 1.3 measured
WeirdMLNot measured43.5%Only Nemotron 3 Ultra measured
ALE-Bench1688.3Not measuredOnly Muse Spark 1.3 measured
LMArena Text: coding15101468Muse Spark 1.3
LMArena Text: software and IT15111468Muse Spark 1.3
LMArena WebDev: React1672Not measuredOnly Muse Spark 1.3 measured
LMArena WebDev: HTML1653Not measuredOnly Muse Spark 1.3 measured
LMArena WebDev: from an image1640Not measuredOnly Muse Spark 1.3 measured
Neither model has a result on the other 20 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Muse Spark 1.3 and Nemotron 3 Ultra
BenchmarkMuse Spark 1.3Nemotron 3 UltraLeader
AA Intelligence Index48.122.9Muse Spark 1.3
Epoch Capabilities Index157.2146.0Muse Spark 1.3
Agentic workLike-for-likePublic boards, shown as published, kept out of the index50
Agentic work benchmarks for Muse Spark 1.3 and Nemotron 3 Ultra
BenchmarkMuse Spark 1.3Nemotron 3 UltraLeader
AA Agentic Index55.520.1Muse Spark 1.3
Design Arena: agents building web apps1297Not measuredOnly Muse Spark 1.3 measured
Design Arena: agents building full-stack apps1295Not measuredOnly Muse Spark 1.3 measured
Design Arena: agents building mobile apps1217Not measuredOnly Muse Spark 1.3 measured
Design Arena: agents building Godot games1241Not measuredOnly Muse Spark 1.3 measured
Design Arena: PowerPoint slides1217Not measuredOnly Muse Spark 1.3 measured
Design Arena: spreadsheets1075Not measuredOnly Muse Spark 1.3 measured
LiveBench research68.6%Not measuredOnly Muse Spark 1.3 measured
LiveBench browser80.0%Not measuredOnly Muse Spark 1.3 measured
LiveBench long agentic40.4%Not measuredOnly Muse Spark 1.3 measured
Finance Agent (Vals AI)58.9%37.7%Muse Spark 1.3
Tax Agent Bench (Vals AI)36.0%Not measuredOnly Muse Spark 1.3 measured
Legal Research Bench (Vals AI)40.9%15.4%Muse Spark 1.3
Excel Modeling Benchmark (Vals AI)62.7%31.7%Muse Spark 1.3
Terminal-Bench-Science (Vals AI)4.3%Not measuredOnly Muse Spark 1.3 measured
τ²-Bench TelecomNot measured83.3%Only Nemotron 3 Ultra measured
APEX-Agents58.6%22.7%Muse Spark 1.3
MCP AtlasNot measured63.1%Only Nemotron 3 Ultra measured
Neither model has a result on the other 24 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index60
Reasoning benchmarks for Muse Spark 1.3 and Nemotron 3 Ultra
BenchmarkMuse Spark 1.3Nemotron 3 UltraLeader
GPQA DiamondNot measured86.1%Only Nemotron 3 Ultra measured
LiveBench reasoning89.7%Not measuredOnly Muse Spark 1.3 measured
GPQA Diamond (Artificial Analysis run)94.1%86.7%Muse Spark 1.3
Humanity's Last Exam (Artificial Analysis run)48.7%28.4%Muse Spark 1.3
GPQA Diamond (Epoch AI run)Not measured85.4%Only Nemotron 3 Ultra measured
Chess puzzles37.0%Not measuredOnly Muse Spark 1.3 measured
Mystery game puzzles25.0%20.0%Muse Spark 1.3
LMArena Text: hard prompts15031452Muse Spark 1.3
LMArena Text: expert15191472Muse Spark 1.3
LMArena Text: hard prompts in English15001453Muse Spark 1.3
LMArena Vision: diagrams1330Not measuredOnly Muse Spark 1.3 measured
LMArena Vision: homework1296Not measuredOnly Muse Spark 1.3 measured
Humanity's Last Exam (Scale run)25.4%Not measuredOnly Muse Spark 1.3 measured
Neither model has a result on the other 10 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index40
Math benchmarks for Muse Spark 1.3 and Nemotron 3 Ultra
BenchmarkMuse Spark 1.3Nemotron 3 UltraLeader
OTIS Mock AIME99.2%86.7%Muse Spark 1.3
FrontierMath, tiers 1 to 374.4%Not measuredOnly Muse Spark 1.3 measured
FrontierMath, tier 446.3%Not measuredOnly Muse Spark 1.3 measured
ProofBench58.0%2.0%Muse Spark 1.3
LMArena Text: math14971457Muse Spark 1.3
LMArena Text: mathematical work14911461Muse Spark 1.3
MathArena43.0%Not measuredOnly Muse Spark 1.3 measured
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index40
Knowledge benchmarks for Muse Spark 1.3 and Nemotron 3 Ultra
BenchmarkMuse Spark 1.3Nemotron 3 UltraLeader
MMLU ProNot measured85.8%Only Nemotron 3 Ultra measured
LegalBench (Vals AI)Not measured82.1%Only Nemotron 3 Ultra measured
CorpFin (Vals AI)Not measured65.5%Only Nemotron 3 Ultra measured
TaxEval (Vals AI)Not measured73.1%Only Nemotron 3 Ultra measured
MedCode (Vals AI)Not measured38.6%Only Nemotron 3 Ultra measured
LMArena Text: science15071465Muse Spark 1.3
LMArena Text: medicine and healthcare14931456Muse Spark 1.3
LMArena Text: legal and government14991452Muse Spark 1.3
LMArena Text: business and finance14901434Muse Spark 1.3
PRBench Finance59.5%Not measuredOnly Muse Spark 1.3 measured
PRBench Legal61.6%Not measuredOnly Muse Spark 1.3 measured
Neither model has a result on the other 9 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index80
Web design benchmarks for Muse Spark 1.3 and Nemotron 3 Ultra
BenchmarkMuse Spark 1.3Nemotron 3 UltraLeader
Design Arena: websites13561145Muse Spark 1.3
Design Arena: UI components13501135Muse Spark 1.3
Design Arena: game dev13281138Muse Spark 1.3
Design Arena: data viz13441141Muse Spark 1.3
Design Arena: 3D13581131Muse Spark 1.3
Design Arena: all code categories13521146Muse Spark 1.3
Design Arena: SVG13011069Muse Spark 1.3
Design Arena: ASCII art12831100Muse Spark 1.3
LiveBench design74.8%Not measuredOnly Muse Spark 1.3 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index190
General benchmarks for Muse Spark 1.3 and Nemotron 3 Ultra
BenchmarkMuse Spark 1.3Nemotron 3 UltraLeader
LiveBench data analysis79.6%Not measuredOnly Muse Spark 1.3 measured
IFBenchNot measured81.4%Only Nemotron 3 Ultra measured
Long context reasoning (AA-LCR)83.0%79.3%Muse Spark 1.3
DTBench96.5%90.1%Muse Spark 1.3
LMCA53.9%36.9%Muse Spark 1.3
LMArena Text14901445Muse Spark 1.3
LMArena Text: instruction following14791418Muse Spark 1.3
LMArena Text: creative writing14621399Muse Spark 1.3
LMArena Vision1308Not measuredOnly Muse Spark 1.3 measured
LMArena Text: English14951455Muse Spark 1.3
LMArena Text: non-English14811427Muse Spark 1.3
LMArena Text: Chinese15321497Muse Spark 1.3
LMArena Text: German15131472Muse Spark 1.3
LMArena Text: Japanese1470Not measuredOnly Muse Spark 1.3 measured
LMArena Text: Korean14901384Muse Spark 1.3
LMArena Text: French15111472Muse Spark 1.3
LMArena Text: Spanish14961455Muse Spark 1.3
LMArena Text: Russian14911417Muse Spark 1.3
LMArena Text: Polish14901385Muse Spark 1.3
LMArena Text: multi-turn14871411Muse Spark 1.3
LMArena Text: longer queries14881437Muse Spark 1.3
LMArena Text: writing and language14701406Muse Spark 1.3
LMArena Text: entertainment and media14571397Muse Spark 1.3
LMArena Vision: English1298Not measuredOnly Muse Spark 1.3 measured
LMArena Vision: Chinese1384Not measuredOnly Muse Spark 1.3 measured
LMArena Vision: reading text1319Not measuredOnly Muse Spark 1.3 measured
LMArena Vision: humor1293Not measuredOnly Muse Spark 1.3 measured
LMArena Vision: creative writing1296Not measuredOnly Muse Spark 1.3 measured
Neither model has a result on the other 20 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Muse Spark 1.3 and Nemotron 3 Ultra
BenchmarkMuse Spark 1.3Nemotron 3 UltraLeader
Neither model has a result on 5 boards here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

Muse Spark 1.3$0.0034Fits in one request
Nemotron 3 Ultra$0.0018Fits in one request

Nemotron 3 Ultra costs less

Repository review

50K input + 3K output tokens

Muse Spark 1.3$0.075Fits in one request
Nemotron 3 Ultra$0.037Fits in one request

Nemotron 3 Ultra costs less

Agent loop

200K input + 10K output tokens

Muse Spark 1.3$0.292Fits in one request
Nemotron 3 Ultra$0.144Fits in one request

Nemotron 3 Ultra costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of Muse Spark 1.3 and Nemotron 3 Ultra
SpecificationMeta Muse Spark 1.3NVIDIA Nemotron 3 Ultra
MakerMetaNVIDIA
WeightsNo public weights listedOpen weights
ReleasedSeptember 2, 2026June 4, 2026
Context window1.05M262K
Input $/Mtok$1.25$0.60
Output $/Mtok$4.25$2.40
Coding index57.430.0
Independent measurements behind it43
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Muse Spark 1.3 better than Nemotron 3 Ultra for coding?

Pick Muse Spark 1.3 for coding: it scores 57.4 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra. Pick Nemotron 3 Ultra for output tokens 1.8x cheaper ($2.40 vs $4.25 per million).

Which is cheaper, Muse Spark 1.3 or Nemotron 3 Ultra?

Muse Spark 1.3 costs $1.25 per million input tokens and $4.25 per million output tokens; Nemotron 3 Ultra costs $0.60 and $2.40. Cost per solved task is known for neither of them.

Which has the bigger context window, Muse Spark 1.3 or Nemotron 3 Ultra?

Muse Spark 1.3, with 1.05M tokens against 262K.

How many benchmarks is the Muse Spark 1.3 vs Nemotron 3 Ultra comparison based on?

56 benchmarks have a result for both models as of October 22, 2026. Muse Spark 1.3's coding index rests on 4 independent benchmarks and Nemotron 3 Ultra's on 3. Where only one model has a result, the page says so instead of naming a winner.

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<iframe src="https://llmbenchmark.ai/embed/compare/meta-muse-spark-1-3-vs-nvidia-nemotron-3-ultra-550b-a55b" title="Muse Spark 1.3 vs Nemotron 3 Ultra, LLMBenchmark.ai" width="100%" height="360" style="border:0;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/meta-muse-spark-1-3-vs-nvidia-nemotron-3-ultra-550b-a55b">LLMBenchmark.ai, Muse Spark 1.3 vs Nemotron 3 Ultra</a></p>