Muse Ember vs Nemotron 3 Ultra
Muse Ember leads Nemotron 3 Ultra on coding, 64.9 to 30.0 on the Vibe Coding Index, and Muse Ember costs 4.6x less per output token ($0.50 vs $2.30 per million). Updated November 14, 2026; 8 benchmarks have a result for both.
Muse Ember or Nemotron 3 Ultra: which to pick
Pick Muse Ember for coding: it scores 64.9 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra.
Nemotron 3 Ultra is neither cheaper nor larger in context, and leads no benchmark both models were measured on.
- Shared results
- 8
- Muse Ember only
- 7
- Nemotron 3 Ultra only
- 72
- Like-for-like categories
- 4 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.
Coding
Vibe Coding Index, six public coding benchmarks
Muse Ember
Muse Ember scores 64.9 against 30.0.
3 benchmarks behind each score
Intelligence
AA Intelligence Index
No call
Only Nemotron 3 Ultra has a AA Intelligence Index result, 11.8.
Directional only
Agentic work
AA Agentic Index
No call
Only Nemotron 3 Ultra has a AA Agentic Index result, 20.1.
Directional only
Reasoning
GPQA Diamond
No call
Only Nemotron 3 Ultra has a GPQA Diamond result, 86.1%.
Directional only
Knowledge
MMLU Pro
No call
Only Nemotron 3 Ultra has a MMLU Pro result, 85.8%.
Directional only
Web design
Design Arena: websites
No call
Only Nemotron 3 Ultra has a Design Arena: websites result, 1129.
Directional only
General
Vals Index
No call
Only Muse Ember has a Vals Index result, 60.5%.
Directional only
Long documents
Listed context window
Muse Ember
Muse Ember takes 1.05M tokens against 262K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Muse Ember
Muse Ember $0.0003, Nemotron 3 Ultra $0.0017 per turn.
List prices
At a glance
- Coding index
- Muse Ember 64.9 from 3 benchmarks, Nemotron 3 Ultra 30.0 from 3 benchmarks.
- Widest category
- Coding, 47.5 points apart on average over 3 shared benchmarks.
- Widest single gap
- Vibe Code Bench (Vals AI): Muse Ember 83.7% against Nemotron 3 Ultra 7.6%, 76.1 points apart on a 0 to 100 scale.
- Output price
- Muse Ember $0.50 against Nemotron 3 Ultra $2.30 per million output tokens, 4.6x apart.
- Context window
- Muse Ember 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.
| Category | Muse Ember | Bars | Nemotron 3 Ultra | Ties |
|---|---|---|---|---|
| Coding | 3 | 0 | ||
| Agentic work | 2 | 0 | ||
| Reasoning | 2 | 0 | ||
| Knowledge | 1 | 0 | ||
| All shared boards | 8 | 0 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index30
| Benchmark | Muse Ember | Nemotron 3 Ultra | Leader |
|---|---|---|---|
| LMArena WebDev | 1609 | Not measured | Only Muse Ember measured |
| AA Coding Index | Not measured | 49.3 | Only Nemotron 3 Ultra measured |
| LiveCodeBench (Vals AI) | Not measured | 86.0% | Only Nemotron 3 Ultra measured |
| SWE-bench Verified (Vals AI) | Not measured | 69.0% | Only Nemotron 3 Ultra measured |
| Terminal-Bench 4 (Vals AI) | 39.4% | Not measured | Only Muse Ember measured |
| Vibe Code Bench (Vals AI) | 83.7% | 7.6% | Muse Ember |
| Code migration (Vals AI) | Not measured | 4.9% | Only Nemotron 3 Ultra measured |
| ProgramBench (Vals AI) | Not measured | 0.0% | Only Nemotron 3 Ultra measured |
| Terminal-Bench 2.1 (Vals AI) | Not measured | 50.9% | Only Nemotron 3 Ultra measured |
| SciCode | Not measured | 40.3% | Only Nemotron 3 Ultra measured |
| Terminal-Bench Hard (Artificial Analysis run) | Not measured | 36.4% | Only Nemotron 3 Ultra measured |
| Terminal-Bench 4.0 (Artificial Analysis run) | 40.9% | 0.5% | Muse Ember |
| FrontierCode 2.0 | 27.2% | 1.1% | Muse Ember |
| FrontierCode | Not measured | 13.6% | Only Nemotron 3 Ultra measured |
| WeirdML | Not measured | 43.5% | Only Nemotron 3 Ultra measured |
| LMArena Text: coding | Not measured | 1468 | Only Nemotron 3 Ultra measured |
| LMArena Text: software and IT | Not measured | 1468 | Only Nemotron 3 Ultra measured |
| LMArena WebDev: React | 1616 | Not measured | Only Muse Ember measured |
| LMArena WebDev: HTML | 1621 | Not measured | Only Muse Ember measured |
| GameBench 2 | Not measured | 45.6 | Only Nemotron 3 Ultra measured |
| Neither model has a result on the other 32 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index2 boards, none shared
| Benchmark | Muse Ember | Nemotron 3 Ultra | Leader |
|---|---|---|---|
| AA Intelligence Index | Not measured | 11.8 | Only Nemotron 3 Ultra measured |
| Epoch Capabilities Index | Not measured | 146.9 | Only Nemotron 3 Ultra measured |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index20
| Benchmark | Muse Ember | Nemotron 3 Ultra | Leader |
|---|---|---|---|
| AA Agentic Index | Not measured | 20.1 | Only Nemotron 3 Ultra measured |
| Finance Agent (Vals AI) | Not measured | 37.7% | Only Nemotron 3 Ultra measured |
| Tax Agent Bench (Vals AI) | 38.2% | Not measured | Only Muse Ember measured |
| Legal Research Bench (Vals AI) | 49.0% | 15.4% | Muse Ember |
| Harvey's Legal Agent Benchmark (Vals AI) | 25.0% | Not measured | Only Muse Ember measured |
| Excel Modeling Benchmark (Vals AI) | Not measured | 31.7% | Only Nemotron 3 Ultra measured |
| τ²-Bench Telecom | Not measured | 83.3% | Only Nemotron 3 Ultra measured |
| APEX-Agents | 64.3% | 22.7% | Muse Ember |
| MCP Atlas | Not measured | 63.1% | Only Nemotron 3 Ultra measured |
| Toolathlon-Verified | Not measured | 34.3% | Only Nemotron 3 Ultra measured |
| Neither model has a result on the other 34 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index20
| Benchmark | Muse Ember | Nemotron 3 Ultra | Leader |
|---|---|---|---|
| GPQA Diamond | Not measured | 86.1% | Only Nemotron 3 Ultra measured |
| GPQA Diamond (Artificial Analysis run) | Not measured | 86.7% | Only Nemotron 3 Ultra measured |
| Humanity's Last Exam (Artificial Analysis run) | Not measured | 28.4% | Only Nemotron 3 Ultra measured |
| HLE-Diamond (Artificial Analysis run) | 25.1% | 8.5% | Muse Ember |
| CritPt v2, hard subset (Artificial Analysis run) | 39.0% | 15.0% | Muse Ember |
| GPQA Diamond (Epoch AI run) | Not measured | 85.4% | Only Nemotron 3 Ultra measured |
| SimpleBench | Not measured | 41.7% | Only Nemotron 3 Ultra measured |
| Mystery game puzzles | Not measured | 20.0% | Only Nemotron 3 Ultra measured |
| LMArena Text: hard prompts | Not measured | 1452 | Only Nemotron 3 Ultra measured |
| LMArena Text: expert | Not measured | 1473 | Only Nemotron 3 Ultra measured |
| LMArena Text: hard prompts in English | Not measured | 1452 | Only Nemotron 3 Ultra measured |
| Neither model has a result on the other 15 boards here | |||
MathDirectional onlyPublic boards, shown as published, kept out of the index4 boards, none shared
| Benchmark | Muse Ember | Nemotron 3 Ultra | Leader |
|---|---|---|---|
| OTIS Mock AIME | Not measured | 86.7% | Only Nemotron 3 Ultra measured |
| ProofBench | Not measured | 2.0% | Only Nemotron 3 Ultra measured |
| LMArena Text: math | Not measured | 1456 | Only Nemotron 3 Ultra measured |
| LMArena Text: mathematical work | Not measured | 1462 | Only Nemotron 3 Ultra measured |
| Neither model has a result on the other 10 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Muse Ember | Nemotron 3 Ultra | Leader |
|---|---|---|---|
| MMLU Pro | Not measured | 85.8% | Only Nemotron 3 Ultra measured |
| LegalBench (Vals AI) | Not measured | 82.1% | Only Nemotron 3 Ultra measured |
| CorpFin (Vals AI) | Not measured | 65.5% | Only Nemotron 3 Ultra measured |
| TaxEval (Vals AI) | Not measured | 73.1% | Only Nemotron 3 Ultra measured |
| MedCode (Vals AI) | Not measured | 38.6% | Only Nemotron 3 Ultra measured |
| AA-Omniscience | 7.7 | 3.4 | Muse Ember |
| LMArena Text: science | Not measured | 1465 | Only Nemotron 3 Ultra measured |
| LMArena Text: medicine and healthcare | Not measured | 1457 | Only Nemotron 3 Ultra measured |
| LMArena Text: legal and government | Not measured | 1455 | Only Nemotron 3 Ultra measured |
| LMArena Text: business and finance | Not measured | 1435 | Only Nemotron 3 Ultra measured |
| Neither model has a result on the other 11 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
| Benchmark | Muse Ember | Nemotron 3 Ultra | Leader |
|---|---|---|---|
| Design Arena: websites | Not measured | 1129 | Only Nemotron 3 Ultra measured |
| Design Arena: UI components | Not measured | 1126 | Only Nemotron 3 Ultra measured |
| Design Arena: game dev | Not measured | 1126 | Only Nemotron 3 Ultra measured |
| Design Arena: data viz | Not measured | 1137 | Only Nemotron 3 Ultra measured |
| Design Arena: 3D | Not measured | 1108 | Only Nemotron 3 Ultra measured |
| Design Arena: all code categories | Not measured | 1131 | Only Nemotron 3 Ultra measured |
| Design Arena: SVG | Not measured | 1060 | Only Nemotron 3 Ultra measured |
| Design Arena: ASCII art | Not measured | 1093 | Only Nemotron 3 Ultra measured |
| Neither model has a result on the other 1 board here | |||
GeneralDirectional onlyPublic boards, shown as published, kept out of the index22 boards, none shared
| Benchmark | Muse Ember | Nemotron 3 Ultra | Leader |
|---|---|---|---|
| Vals Index | 60.5% | Not measured | Only Muse Ember measured |
| IFBench | Not measured | 81.4% | Only Nemotron 3 Ultra measured |
| Long context reasoning (AA-LCR) | Not measured | 79.3% | Only Nemotron 3 Ultra measured |
| GDPval-AA | Not measured | 1020 | Only Nemotron 3 Ultra measured |
| DTBench | Not measured | 90.1% | Only Nemotron 3 Ultra measured |
| LMCA | Not measured | 36.9% | Only Nemotron 3 Ultra measured |
| LMArena Text | Not measured | 1445 | Only Nemotron 3 Ultra measured |
| LMArena Text: instruction following | Not measured | 1418 | Only Nemotron 3 Ultra measured |
| LMArena Text: creative writing | Not measured | 1399 | Only Nemotron 3 Ultra measured |
| LMArena Text: English | Not measured | 1454 | Only Nemotron 3 Ultra measured |
| LMArena Text: non-English | Not measured | 1428 | Only Nemotron 3 Ultra measured |
| LMArena Text: Chinese | Not measured | 1498 | Only Nemotron 3 Ultra measured |
| LMArena Text: German | Not measured | 1473 | Only Nemotron 3 Ultra measured |
| LMArena Text: Korean | Not measured | 1383 | Only Nemotron 3 Ultra measured |
| LMArena Text: French | Not measured | 1472 | Only Nemotron 3 Ultra measured |
| LMArena Text: Spanish | Not measured | 1458 | Only Nemotron 3 Ultra measured |
| LMArena Text: Russian | Not measured | 1420 | Only Nemotron 3 Ultra measured |
| LMArena Text: Polish | Not measured | 1382 | Only Nemotron 3 Ultra measured |
| LMArena Text: multi-turn | Not measured | 1410 | Only Nemotron 3 Ultra measured |
| LMArena Text: longer queries | Not measured | 1437 | Only Nemotron 3 Ultra measured |
| LMArena Text: writing and language | Not measured | 1407 | Only Nemotron 3 Ultra measured |
| LMArena Text: entertainment and media | Not measured | 1399 | Only Nemotron 3 Ultra measured |
| Neither model has a result on the other 27 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Muse Ember | Nemotron 3 Ultra | Leader |
|---|---|---|---|
| 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 Ember costs less
Repository review
50K input + 3K output tokens
Muse Ember costs less
Agent loop
200K input + 10K output tokens
Muse Ember 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.
| Specification | Meta Muse Ember | NVIDIA Nemotron 3 Ultra |
|---|---|---|
| Maker | Meta | NVIDIA |
| Weights | No public weights listed | Open weights |
| Released | November 9, 2026 | June 4, 2026 |
| Context window | 1.05M | 262K |
| Input $/Mtok | $0.10 | $0.55 |
| Output $/Mtok | $0.50 | $2.30 |
| Coding index | 64.9 | 30.0 |
| Independent measurements behind it | 3 | 3 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Muse Ember better than Nemotron 3 Ultra for coding?
Pick Muse Ember for coding: it scores 64.9 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra. Nemotron 3 Ultra is neither cheaper nor larger in context, and leads no benchmark both models were measured on.
Which is cheaper, Muse Ember or Nemotron 3 Ultra?
Muse Ember costs $0.10 per million input tokens and $0.50 per million output tokens; Nemotron 3 Ultra costs $0.55 and $2.30. Cost per solved task is known for neither of them.
Which has the bigger context window, Muse Ember or Nemotron 3 Ultra?
Muse Ember, with 1.05M tokens against 262K.
How many benchmarks is the Muse Ember vs Nemotron 3 Ultra comparison based on?
8 benchmarks have a result for both models as of November 14, 2026. Muse Ember's coding index rests on 3 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.