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Muse Spark 1.2 vs Nemotron 3 Ultra

Muse Spark 1.2 leads Nemotron 3 Ultra on coding, 55.7 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 23, 2026; 59 benchmarks have a result for both.

Replace Muse Spark 1.2 Replace Nemotron 3 Ultra
Muse Spark 1.2Meta
Coding
55.7
Overall
60.3
Output $/M
$4.25
58
Nemotron 3 UltraNVIDIA
Coding
30.0
Overall
53.1
Output $/M
$2.40
1
vs boards won of 59 shared

Muse Spark 1.2 or Nemotron 3 Ultra: which to pick

Pick Muse Spark 1.2 for coding: it scores 55.7 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) and work measured by Long context reasoning (AA-LCR), where it leads.

Model AMuse Spark 1.2Meta55.7/1005 independent benchmarks$0.64 per solved taskModel BNemotron 3 UltraNVIDIA30.0/1003 independent benchmarksNo cost per solved task
Shared results
59
Muse Spark 1.2 only
38
Nemotron 3 Ultra only
12
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 1.2 55.7 from 5 benchmarks, Nemotron 3 Ultra 30.0 from 3 benchmarks.
Widest category
Agentic work, 24.5 points apart on average over 5 shared benchmarks.
Widest single gap
Vibe Code Bench (Vals AI): Muse Spark 1.2 79.1% against Nemotron 3 Ultra 7.6%, 71.5 points apart on a 0 to 100 scale.
Output price
Muse Spark 1.2 $4.25 against Nemotron 3 Ultra $2.40 per million output tokens, 1.8x apart.
Context window
Muse Spark 1.2 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 1.2BarsNemotron 3 UltraTies
Coding100
Intelligence20
Agentic work50
Reasoning50
Math30
Knowledge90
Web design80
General161
All shared boards581
CodingLike-for-likeSix of these boards feed the Vibe Coding Index100
Coding benchmarks for Muse Spark 1.2 and Nemotron 3 Ultra
BenchmarkMuse Spark 1.2Nemotron 3 UltraLeader
LiveBench coding78.2%Not measuredOnly Muse Spark 1.2 measured
LMArena WebDev1534Not measuredOnly Muse Spark 1.2 measured
AA Coding Index72.249.3Muse Spark 1.2
LiveCodeBench (Vals AI)Not measured86.0%Only Nemotron 3 Ultra measured
SWE-bench Verified (Vals AI)86.6%69.0%Muse Spark 1.2
Terminal-Bench 4 (Vals AI)6.1%Not measuredOnly Muse Spark 1.2 measured
Vibe Code Bench (Vals AI)79.1%7.6%Muse Spark 1.2
Code migration (Vals AI)29.9%4.9%Muse Spark 1.2
ProgramBench (Vals AI)0.5%0.0%Muse Spark 1.2
IOI (Vals AI)21.8%Not measuredOnly Muse Spark 1.2 measured
Terminal-Bench 2.1 (Vals AI)69.7%50.9%Muse Spark 1.2
SkillsBench (Vals AI)53.0%Not measuredOnly Muse Spark 1.2 measured
CyberBench (Vals AI)69.5%Not measuredOnly Muse Spark 1.2 measured
SciCode57.4%40.3%Muse Spark 1.2
Terminal-Bench Hard (Artificial Analysis run)Not measured36.4%Only Nemotron 3 Ultra measured
FrontierCodeNot measured13.6%Only Nemotron 3 Ultra measured
FrontierSWE12.0%Not measuredOnly Muse Spark 1.2 measured
WeirdML60.3%43.5%Muse Spark 1.2
LMArena Text: coding15051467Muse Spark 1.2
LMArena Text: software and IT15061468Muse Spark 1.2
LMArena WebDev: React1525Not measuredOnly Muse Spark 1.2 measured
LMArena WebDev: HTML1543Not measuredOnly Muse Spark 1.2 measured
Neither model has a result on the other 21 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Muse Spark 1.2 and Nemotron 3 Ultra
BenchmarkMuse Spark 1.2Nemotron 3 UltraLeader
AA Intelligence Index39.622.9Muse Spark 1.2
Epoch Capabilities Index155.1146.0Muse Spark 1.2
Agentic workLike-for-likePublic boards, shown as published, kept out of the index50
Agentic work benchmarks for Muse Spark 1.2 and Nemotron 3 Ultra
BenchmarkMuse Spark 1.2Nemotron 3 UltraLeader
AA Agentic Index43.220.1Muse Spark 1.2
Design Arena: agents building web apps1221Not measuredOnly Muse Spark 1.2 measured
Design Arena: agents building full-stack apps1210Not measuredOnly Muse Spark 1.2 measured
Design Arena: agents building mobile apps1182Not measuredOnly Muse Spark 1.2 measured
Design Arena: agents building Android apps1223Not measuredOnly Muse Spark 1.2 measured
Design Arena: agents building games1178Not measuredOnly Muse Spark 1.2 measured
Design Arena: HTML slides1040Not measuredOnly Muse Spark 1.2 measured
Design Arena: PowerPoint slides1160Not measuredOnly Muse Spark 1.2 measured
LiveBench research67.7%Not measuredOnly Muse Spark 1.2 measured
LiveBench browser36.0%Not measuredOnly Muse Spark 1.2 measured
LiveBench long agentic21.3%Not measuredOnly Muse Spark 1.2 measured
SREBench (Vals AI)0.0%Not measuredOnly Muse Spark 1.2 measured
Finance Agent (Vals AI)60.6%37.7%Muse Spark 1.2
Tax Agent Bench (Vals AI)32.8%Not measuredOnly Muse Spark 1.2 measured
Legal Research Bench (Vals AI)43.8%15.4%Muse Spark 1.2
Excel Modeling Benchmark (Vals AI)57.0%31.7%Muse Spark 1.2
BioMysteryBench (Vals AI)64.8%Not measuredOnly Muse Spark 1.2 measured
τ²-Bench TelecomNot measured83.3%Only Nemotron 3 Ultra measured
APEX-Agents45.4%22.7%Muse Spark 1.2
MCP AtlasNot measured63.1%Only Nemotron 3 Ultra measured
Neither model has a result on the other 22 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index50
Reasoning benchmarks for Muse Spark 1.2 and Nemotron 3 Ultra
BenchmarkMuse Spark 1.2Nemotron 3 UltraLeader
GPQA DiamondNot measured86.1%Only Nemotron 3 Ultra measured
LiveBench reasoning90.0%Not measuredOnly Muse Spark 1.2 measured
MMMU Pro (Vals AI)86.1%Not measuredOnly Muse Spark 1.2 measured
GPQA Diamond (Artificial Analysis run)90.4%86.7%Muse Spark 1.2
Humanity's Last Exam (Artificial Analysis run)45.5%28.4%Muse Spark 1.2
GPQA Diamond (Epoch AI run)Not measured85.4%Only Nemotron 3 Ultra measured
SimpleBench74.5%Not measuredOnly Muse Spark 1.2 measured
Chess puzzles27.0%Not measuredOnly Muse Spark 1.2 measured
Mystery game puzzlesNot measured20.0%Only Nemotron 3 Ultra measured
LMArena Text: hard prompts14901452Muse Spark 1.2
LMArena Text: expert14741472Muse Spark 1.2
LMArena Text: hard prompts in English14891453Muse Spark 1.2
LMArena Vision: diagrams1317Not measuredOnly Muse Spark 1.2 measured
Neither model has a result on the other 10 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index30
Math benchmarks for Muse Spark 1.2 and Nemotron 3 Ultra
BenchmarkMuse Spark 1.2Nemotron 3 UltraLeader
OTIS Mock AIMENot measured86.7%Only Nemotron 3 Ultra measured
ProofBench43.0%2.0%Muse Spark 1.2
LMArena Text: math14831457Muse Spark 1.2
LMArena Text: mathematical work14811462Muse Spark 1.2
Neither model has a result on the other 10 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index90
Knowledge benchmarks for Muse Spark 1.2 and Nemotron 3 Ultra
BenchmarkMuse Spark 1.2Nemotron 3 UltraLeader
MMLU Pro88.3%85.8%Muse Spark 1.2
LegalBench (Vals AI)85.3%82.1%Muse Spark 1.2
CorpFin (Vals AI)70.9%65.5%Muse Spark 1.2
TaxEval (Vals AI)80.4%73.1%Muse Spark 1.2
MortgageTax (Vals AI)65.4%Not measuredOnly Muse Spark 1.2 measured
MedCode (Vals AI)49.4%38.6%Muse Spark 1.2
SimpleQA Verified60.3%Not measuredOnly Muse Spark 1.2 measured
LMArena Text: science14981465Muse Spark 1.2
LMArena Text: medicine and healthcare14951455Muse Spark 1.2
LMArena Text: legal and government15131453Muse Spark 1.2
LMArena Text: business and finance14841435Muse Spark 1.2
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 1.2 and Nemotron 3 Ultra
BenchmarkMuse Spark 1.2Nemotron 3 UltraLeader
Design Arena: websites13121145Muse Spark 1.2
Design Arena: UI components13001135Muse Spark 1.2
Design Arena: game dev13011138Muse Spark 1.2
Design Arena: data viz13351142Muse Spark 1.2
Design Arena: 3D13021132Muse Spark 1.2
Design Arena: all code categories13121146Muse Spark 1.2
Design Arena: SVG12831069Muse Spark 1.2
Design Arena: ASCII art12841100Muse Spark 1.2
LiveBench design67.1%Not measuredOnly Muse Spark 1.2 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index161
General benchmarks for Muse Spark 1.2 and Nemotron 3 Ultra
BenchmarkMuse Spark 1.2Nemotron 3 UltraLeader
LiveBench data analysis76.5%Not measuredOnly Muse Spark 1.2 measured
Public Benefits Bench (Vals AI)68.5%Not measuredOnly Muse Spark 1.2 measured
SAGE (Vals AI)47.7%Not measuredOnly Muse Spark 1.2 measured
MedScribe (Vals AI)90.1%Not measuredOnly Muse Spark 1.2 measured
Vals Multimodal Index69.8%Not measuredOnly Muse Spark 1.2 measured
IFBenchNot measured81.4%Only Nemotron 3 Ultra measured
Long context reasoning (AA-LCR)79.0%79.3%Nemotron 3 Ultra
DTBench94.7%90.1%Muse Spark 1.2
LMCA48.4%36.9%Muse Spark 1.2
LMArena Text14821445Muse Spark 1.2
LMArena Text: instruction following14631418Muse Spark 1.2
LMArena Text: creative writing14351398Muse Spark 1.2
LMArena Vision1304Not measuredOnly Muse Spark 1.2 measured
LMArena Text: English14831454Muse Spark 1.2
LMArena Text: non-English14751427Muse Spark 1.2
LMArena Text: Chinese15061498Muse Spark 1.2
LMArena Text: GermanNot measured1474Only Nemotron 3 Ultra measured
LMArena Text: Korean14561385Muse Spark 1.2
LMArena Text: French14921473Muse Spark 1.2
LMArena Text: Spanish14791454Muse Spark 1.2
LMArena Text: Russian14841417Muse Spark 1.2
LMArena Text: PolishNot measured1385Only Nemotron 3 Ultra measured
LMArena Text: multi-turn15001411Muse Spark 1.2
LMArena Text: longer queries14731437Muse Spark 1.2
LMArena Text: writing and language14541405Muse Spark 1.2
LMArena Text: entertainment and media14431397Muse Spark 1.2
LMArena Vision: English1291Not measuredOnly Muse Spark 1.2 measured
LMArena Vision: reading text1313Not measuredOnly Muse Spark 1.2 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 1.2 and Nemotron 3 Ultra
BenchmarkMuse Spark 1.2Nemotron 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 1.2$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 1.2$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 1.2$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 1.2 and Nemotron 3 Ultra
SpecificationMeta Muse Spark 1.2NVIDIA Nemotron 3 Ultra
MakerMetaNVIDIA
WeightsNo public weights listedOpen weights
ReleasedAugust 5, 2026June 4, 2026
Context window1.05M262K
Input $/Mtok$1.25$0.60
Output $/Mtok$4.25$2.40
Coding index55.730.0
Independent measurements behind it53
Cost per solved task$0.64Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Muse Spark 1.2 better than Nemotron 3 Ultra for coding?

Pick Muse Spark 1.2 for coding: it scores 55.7 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) and work measured by Long context reasoning (AA-LCR), where it leads.

Which is cheaper, Muse Spark 1.2 or Nemotron 3 Ultra?

Muse Spark 1.2 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 Muse Spark 1.2 only.

Which has the bigger context window, Muse Spark 1.2 or Nemotron 3 Ultra?

Muse Spark 1.2, with 1.05M tokens against 262K.

How many benchmarks is the Muse Spark 1.2 vs Nemotron 3 Ultra comparison based on?

59 benchmarks have a result for both models as of October 23, 2026. Muse Spark 1.2's coding index rests on 5 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-1-2-vs-nvidia-nemotron-3-ultra-550b-a55b" title="Muse Spark 1.2 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-1-2-vs-nvidia-nemotron-3-ultra-550b-a55b">LLMBenchmark.ai, Muse Spark 1.2 vs Nemotron 3 Ultra</a></p>