Nemotron 3 Ultra vs Hy4 preview
Hy4 preview leads Nemotron 3 Ultra on coding, 44.3 to 30.0 on the Vibe Coding Index, at about the same output price ($2.501 vs $2.40 per million). Updated October 23, 2026; 10 benchmarks have a result for both.
Nemotron 3 Ultra or Hy4 preview: which to pick
Pick Hy4 preview for coding: it scores 44.3 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra.
Pick Nemotron 3 Ultra for output tokens 1.0x cheaper ($2.40 vs $2.501 per million).
- Shared results
- 10
- Nemotron 3 Ultra only
- 61
- Hy4 preview only
- 14
- 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
Hy4 preview
Hy4 preview scores 44.3 against 30.0.
3 benchmarks behind each score
Intelligence
AA Intelligence Index
No call
Only Nemotron 3 Ultra has a AA Intelligence Index result, 22.9.
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, 1145.
Directional only
General
Vals Index
No call
Only Hy4 preview has a Vals Index result, 53.2%.
Directional only
Long documents
Listed context window
Hy4 preview
Hy4 preview takes 1.05M tokens against 262K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Nemotron 3 Ultra
Nemotron 3 Ultra $0.0018, Hy4 preview $0.0021 per turn.
List prices
At a glance
- Coding index
- Nemotron 3 Ultra 30.0 from 3 benchmarks, Hy4 preview 44.3 from 3 benchmarks.
- Widest category
- Math, 73.0 points apart on average over 1 shared benchmark.
- Widest single gap
- ProofBench: Nemotron 3 Ultra 2.0% against Hy4 preview 75.0%, 73.0 points apart on a 0 to 100 scale.
- Output price
- Nemotron 3 Ultra $2.40 against Hy4 preview $2.501 per million output tokens, 1.0x apart.
- Context window
- Nemotron 3 Ultra takes 262K tokens, Hy4 preview 1.05M.
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 | Nemotron 3 Ultra | Bars | Hy4 preview | Ties |
|---|---|---|---|---|
| Coding | 0 | 3 | 1 tie | |
| Agentic work | 0 | 3 | ||
| Math | 0 | 1 | ||
| Knowledge | 0 | 2 | ||
| All shared boards | 0 | 9 | 1 tie |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index03
| Benchmark | Nemotron 3 Ultra | Hy4 preview | Leader |
|---|---|---|---|
| LMArena WebDev | Not measured | 1631 | Only Hy4 preview measured |
| AA Coding Index | 49.3 | Not measured | Only Nemotron 3 Ultra measured |
| LiveCodeBench (Vals AI) | 86.0% | Not measured | Only Nemotron 3 Ultra measured |
| SWE-bench Verified (Vals AI) | 69.0% | Not measured | Only Nemotron 3 Ultra measured |
| Terminal-Bench 4 (Vals AI) | Not measured | 8.1% | Only Hy4 preview measured |
| Vibe Code Bench (Vals AI) | 7.6% | 77.5% | Hy4 preview |
| Code migration (Vals AI) | 4.9% | 47.4% | Hy4 preview |
| ProgramBench (Vals AI) | 0.0% | 0.0% | Tie |
| IOI (Vals AI) | Not measured | 59.3% | Only Hy4 preview measured |
| Terminal-Bench 2.1 (Vals AI) | 50.9% | 55.1% | Hy4 preview |
| CyberBench (Vals AI) | Not measured | 65.4% | Only Hy4 preview measured |
| SciCode | 40.3% | Not measured | Only Nemotron 3 Ultra measured |
| Terminal-Bench Hard (Artificial Analysis run) | 36.4% | Not measured | Only Nemotron 3 Ultra measured |
| FrontierCode | 13.6% | Not measured | Only Nemotron 3 Ultra measured |
| WeirdML | 43.5% | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: coding | 1467 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: software and IT | 1468 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena WebDev: React | Not measured | 1653 | Only Hy4 preview measured |
| LMArena WebDev: HTML | Not measured | 1620 | Only Hy4 preview measured |
| Neither model has a result on the other 24 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index2 boards, none shared
| Benchmark | Nemotron 3 Ultra | Hy4 preview | Leader |
|---|---|---|---|
| AA Intelligence Index | 22.9 | Not measured | Only Nemotron 3 Ultra measured |
| Epoch Capabilities Index | 146.0 | Not measured | Only Nemotron 3 Ultra measured |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index03
| Benchmark | Nemotron 3 Ultra | Hy4 preview | Leader |
|---|---|---|---|
| AA Agentic Index | 20.1 | Not measured | Only Nemotron 3 Ultra measured |
| SREBench (Vals AI) | Not measured | 2.3% | Only Hy4 preview measured |
| Finance Agent (Vals AI) | 37.7% | 55.1% | Hy4 preview |
| Tax Agent Bench (Vals AI) | Not measured | 32.6% | Only Hy4 preview measured |
| Legal Research Bench (Vals AI) | 15.4% | 45.2% | Hy4 preview |
| Harvey's Legal Agent Benchmark (Vals AI) | Not measured | 8.8% | Only Hy4 preview measured |
| Excel Modeling Benchmark (Vals AI) | 31.7% | 58.1% | Hy4 preview |
| BioMysteryBench (Vals AI) | Not measured | 69.3% | Only Hy4 preview measured |
| Terminal-Bench-Science (Vals AI) | Not measured | 1.4% | Only Hy4 preview measured |
| τ²-Bench Telecom | 83.3% | Not measured | Only Nemotron 3 Ultra measured |
| APEX-Agents | 22.7% | Not measured | Only Nemotron 3 Ultra measured |
| MCP Atlas | 63.1% | Not measured | Only Nemotron 3 Ultra measured |
| Neither model has a result on the other 30 boards here | |||
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
| Benchmark | Nemotron 3 Ultra | Hy4 preview | Leader |
|---|---|---|---|
| GPQA Diamond | 86.1% | Not measured | Only Nemotron 3 Ultra measured |
| GPQA Diamond (Artificial Analysis run) | 86.7% | Not measured | Only Nemotron 3 Ultra measured |
| Humanity's Last Exam (Artificial Analysis run) | 28.4% | Not measured | Only Nemotron 3 Ultra measured |
| GPQA Diamond (Epoch AI run) | 85.4% | Not measured | Only Nemotron 3 Ultra measured |
| Mystery game puzzles | 20.0% | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: hard prompts | 1452 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: expert | 1472 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: hard prompts in English | 1453 | Not measured | Only Nemotron 3 Ultra measured |
| Neither model has a result on the other 15 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index01
| Benchmark | Nemotron 3 Ultra | Hy4 preview | Leader |
|---|---|---|---|
| OTIS Mock AIME | 86.7% | Not measured | Only Nemotron 3 Ultra measured |
| ProofBench | 2.0% | 75.0% | Hy4 preview |
| LMArena Text: math | 1457 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: mathematical work | 1462 | Not measured | 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 index02
| Benchmark | Nemotron 3 Ultra | Hy4 preview | Leader |
|---|---|---|---|
| MMLU Pro | 85.8% | Not measured | Only Nemotron 3 Ultra measured |
| LegalBench (Vals AI) | 82.1% | 83.8% | Hy4 preview |
| CorpFin (Vals AI) | 65.5% | Not measured | Only Nemotron 3 Ultra measured |
| TaxEval (Vals AI) | 73.1% | Not measured | Only Nemotron 3 Ultra measured |
| MedCode (Vals AI) | 38.6% | 43.3% | Hy4 preview |
| LMArena Text: science | 1465 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: medicine and healthcare | 1455 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: legal and government | 1453 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: business and finance | 1435 | Not measured | 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 | Nemotron 3 Ultra | Hy4 preview | Leader |
|---|---|---|---|
| Design Arena: websites | 1145 | Not measured | Only Nemotron 3 Ultra measured |
| Design Arena: UI components | 1135 | Not measured | Only Nemotron 3 Ultra measured |
| Design Arena: game dev | 1138 | Not measured | Only Nemotron 3 Ultra measured |
| Design Arena: data viz | 1142 | Not measured | Only Nemotron 3 Ultra measured |
| Design Arena: 3D | 1132 | Not measured | Only Nemotron 3 Ultra measured |
| Design Arena: all code categories | 1146 | Not measured | Only Nemotron 3 Ultra measured |
| Design Arena: SVG | 1069 | Not measured | Only Nemotron 3 Ultra measured |
| Design Arena: ASCII art | 1100 | Not measured | 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 index23 boards, none shared
| Benchmark | Nemotron 3 Ultra | Hy4 preview | Leader |
|---|---|---|---|
| Vals Index | Not measured | 53.2% | Only Hy4 preview measured |
| Public Benefits Bench (Vals AI) | Not measured | 68.6% | Only Hy4 preview measured |
| MedScribe (Vals AI) | Not measured | 83.6% | Only Hy4 preview measured |
| IFBench | 81.4% | Not measured | Only Nemotron 3 Ultra measured |
| Long context reasoning (AA-LCR) | 79.3% | Not measured | Only Nemotron 3 Ultra measured |
| DTBench | 90.1% | Not measured | Only Nemotron 3 Ultra measured |
| LMCA | 36.9% | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text | 1445 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: instruction following | 1418 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: creative writing | 1398 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: English | 1454 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: non-English | 1427 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: Chinese | 1498 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: German | 1474 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: Korean | 1385 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: French | 1473 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: Spanish | 1454 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: Russian | 1417 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: Polish | 1385 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: multi-turn | 1411 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: longer queries | 1437 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: writing and language | 1405 | Not measured | Only Nemotron 3 Ultra measured |
| LMArena Text: entertainment and media | 1397 | Not measured | Only Nemotron 3 Ultra measured |
| Neither model has a result on the other 25 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Nemotron 3 Ultra | Hy4 preview | 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
Nemotron 3 Ultra costs less
Repository review
50K input + 3K output tokens
Nemotron 3 Ultra costs less
Agent loop
200K input + 10K output tokens
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.
| Specification | NVIDIA Nemotron 3 Ultra | Tencent Hy4 preview |
|---|---|---|
| Maker | NVIDIA | Tencent |
| Weights | Open weights | Open weights |
| Released | June 4, 2026 | August 28, 2026 |
| Context window | 262K | 1.05M |
| Input $/Mtok | $0.60 | $0.834 |
| Output $/Mtok | $2.40 | $2.501 |
| Coding index | 30.0 | 44.3 |
| Independent measurements behind it | 3 | 3 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Nemotron 3 Ultra better than Hy4 preview for coding?
Pick Hy4 preview for coding: it scores 44.3 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra. Pick Nemotron 3 Ultra for output tokens 1.0x cheaper ($2.40 vs $2.501 per million).
Which is cheaper, Nemotron 3 Ultra or Hy4 preview?
Nemotron 3 Ultra costs $0.60 per million input tokens and $2.40 per million output tokens; Hy4 preview costs $0.834 and $2.501. Cost per solved task is known for neither of them.
Which has the bigger context window, Nemotron 3 Ultra or Hy4 preview?
Hy4 preview, with 1.05M tokens against 262K.
How many benchmarks is the Nemotron 3 Ultra vs Hy4 preview comparison based on?
10 benchmarks have a result for both models as of October 23, 2026. Nemotron 3 Ultra's coding index rests on 3 independent benchmarks and Hy4 preview's on 3. Where only one model has a result, the page says so instead of naming a winner.