Nemotron 3 Ultra vs Qwen3.5 Plus 2026-04-20
Qwen3.5 Plus 2026-04-20 leads Nemotron 3 Ultra on coding, 39.5 to 30.0 on the Vibe Coding Index, and Qwen3.5 Plus 2026-04-20 costs 1.3x less per output token ($1.80 vs $2.40 per million). Updated October 23, 2026; 13 benchmarks have a result for both.
Nemotron 3 Ultra or Qwen3.5 Plus 2026-04-20: which to pick
Pick Qwen3.5 Plus 2026-04-20 for coding: it scores 39.5 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra, though on 2 benchmarks against 3.
Pick Nemotron 3 Ultra for work measured by LiveCodeBench (Vals AI) or GPQA Diamond (Epoch AI run), where it leads.
- Shared results
- 13
- Nemotron 3 Ultra only
- 58
- Qwen3.5 Plus 2026-04-20 only
- 12
- Like-for-like categories
- 6 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
Qwen3.5 Plus 2026-04-20
Qwen3.5 Plus 2026-04-20 scores 39.5 against 30.0.
3 and 2 benchmarks behind the scores
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
Qwen3.5 Plus 2026-04-20
Qwen3.5 Plus 2026-04-20 leads, 87.4% against 86.1%.
Same board, both measured
Math
AIME
No call
Only Qwen3.5 Plus 2026-04-20 has a AIME result, 86.0%.
Directional only
Knowledge
MMLU Pro
Qwen3.5 Plus 2026-04-20
Qwen3.5 Plus 2026-04-20 leads, 87.2% against 85.8%.
Same board, both measured
Web design
Design Arena: websites
No call
Only Nemotron 3 Ultra has a Design Arena: websites result, 1145.
Directional only
Long documents
Listed context window
Qwen3.5 Plus 2026-04-20
Qwen3.5 Plus 2026-04-20 takes 1M tokens against 262K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Qwen3.5 Plus 2026-04-20
Nemotron 3 Ultra $0.0018, Qwen3.5 Plus 2026-04-20 $0.0012 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only Qwen3.5 Plus 2026-04-20 has the number, $1.35.
Directional only
At a glance
- Coding index
- Nemotron 3 Ultra 30.0 from 3 benchmarks, Qwen3.5 Plus 2026-04-20 39.5 from 2 benchmarks.
- Widest category
- General, 5.1 points apart on average over 2 shared benchmarks.
- Widest single gap
- DTBench: Nemotron 3 Ultra 90.1% against Qwen3.5 Plus 2026-04-20 80.5%, 9.6 points apart on a 0 to 100 scale.
- Output price
- Nemotron 3 Ultra $2.40 against Qwen3.5 Plus 2026-04-20 $1.80 per million output tokens, 1.3x apart.
- Context window
- Nemotron 3 Ultra takes 262K tokens, Qwen3.5 Plus 2026-04-20 1M.
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 | Qwen3.5 Plus 2026-04-20 | Ties |
|---|---|---|---|---|
| Coding | 1 | 2 | ||
| Intelligence | 0 | 1 | ||
| Reasoning | 2 | 1 | ||
| Math | 0 | 0 | 1 tie | |
| Knowledge | 1 | 2 | ||
| General | 2 | 0 | ||
| All shared boards | 6 | 6 | 1 tie |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index12
| Benchmark | Nemotron 3 Ultra | Qwen3.5 Plus 2026-04-20 | Leader |
|---|---|---|---|
| AA Coding Index | 49.3 | Not measured | Only Nemotron 3 Ultra measured |
| LiveCodeBench (Vals AI) | 86.0% | 85.3% | Nemotron 3 Ultra |
| SWE-bench Verified (Vals AI) | 69.0% | 71.2% | Qwen3.5 Plus 2026-04-20 |
| Vibe Code Bench (Vals AI) | 7.6% | 15.7% | Qwen3.5 Plus 2026-04-20 |
| Code migration (Vals AI) | 4.9% | Not measured | Only Nemotron 3 Ultra measured |
| ProgramBench (Vals AI) | 0.0% | Not measured | Only Nemotron 3 Ultra measured |
| Terminal-Bench 2.1 (Vals AI) | 50.9% | Not measured | Only Nemotron 3 Ultra 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 |
| ALE-Bench | Not measured | 608.9 | Only Qwen3.5 Plus 2026-04-20 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 |
| Neither model has a result on the other 29 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
| Benchmark | Nemotron 3 Ultra | Qwen3.5 Plus 2026-04-20 | Leader |
|---|---|---|---|
| AA Intelligence Index | 22.9 | Not measured | Only Nemotron 3 Ultra measured |
| Epoch Capabilities Index | 146.0 | 146.2 | Qwen3.5 Plus 2026-04-20 |
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
| Benchmark | Nemotron 3 Ultra | Qwen3.5 Plus 2026-04-20 | Leader |
|---|---|---|---|
| AA Agentic Index | 20.1 | Not measured | Only Nemotron 3 Ultra measured |
| Finance Agent (Vals AI) | 37.7% | Not measured | Only Nemotron 3 Ultra measured |
| Legal Research Bench (Vals AI) | 15.4% | Not measured | Only Nemotron 3 Ultra measured |
| Excel Modeling Benchmark (Vals AI) | 31.7% | Not measured | Only Nemotron 3 Ultra measured |
| τ²-Bench Telecom | 83.3% | Not measured | Only Nemotron 3 Ultra measured |
| APEX-Agents | 22.7% | Not measured | Only Nemotron 3 Ultra measured |
| Vending-Bench 2 | Not measured | $1 | Only Qwen3.5 Plus 2026-04-20 measured |
| MCP Atlas | 63.1% | Not measured | 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 index21
| Benchmark | Nemotron 3 Ultra | Qwen3.5 Plus 2026-04-20 | Leader |
|---|---|---|---|
| GPQA Diamond | 86.1% | 87.4% | Qwen3.5 Plus 2026-04-20 |
| MMMU Pro (Vals AI) | Not measured | 22.8% | Only Qwen3.5 Plus 2026-04-20 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% | 84.8% | Nemotron 3 Ultra |
| Chess puzzles | Not measured | 8.0% | Only Qwen3.5 Plus 2026-04-20 measured |
| Mystery game puzzles | 20.0% | 17.0% | Nemotron 3 Ultra |
| 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 13 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index00
| Benchmark | Nemotron 3 Ultra | Qwen3.5 Plus 2026-04-20 | Leader |
|---|---|---|---|
| AIME | Not measured | 86.0% | Only Qwen3.5 Plus 2026-04-20 measured |
| OTIS Mock AIME | 86.7% | 86.7% | Tie |
| ProofBench | 2.0% | Not measured | Only Nemotron 3 Ultra measured |
| 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 9 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index12
| Benchmark | Nemotron 3 Ultra | Qwen3.5 Plus 2026-04-20 | Leader |
|---|---|---|---|
| MMLU Pro | 85.8% | 87.2% | Qwen3.5 Plus 2026-04-20 |
| LegalBench (Vals AI) | 82.1% | 85.1% | Qwen3.5 Plus 2026-04-20 |
| CaseLaw (Vals AI) | Not measured | 59.7% | Only Qwen3.5 Plus 2026-04-20 measured |
| CorpFin (Vals AI) | 65.5% | 65.3% | Nemotron 3 Ultra |
| TaxEval (Vals AI) | 73.1% | Not measured | Only Nemotron 3 Ultra measured |
| MortgageTax (Vals AI) | Not measured | 60.8% | Only Qwen3.5 Plus 2026-04-20 measured |
| MedQA (Vals AI) | Not measured | 95.2% | Only Qwen3.5 Plus 2026-04-20 measured |
| MedCode (Vals AI) | 38.6% | Not measured | Only Nemotron 3 Ultra measured |
| SimpleQA Verified | Not measured | 25.4% | Only Qwen3.5 Plus 2026-04-20 measured |
| 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 7 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
| Benchmark | Nemotron 3 Ultra | Qwen3.5 Plus 2026-04-20 | 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 | |||
GeneralLike-for-likePublic boards, shown as published, kept out of the index20
| Benchmark | Nemotron 3 Ultra | Qwen3.5 Plus 2026-04-20 | Leader |
|---|---|---|---|
| SAGE (Vals AI) | Not measured | 30.4% | Only Qwen3.5 Plus 2026-04-20 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% | 80.5% | Nemotron 3 Ultra |
| LMCA | 36.9% | 36.4% | Nemotron 3 Ultra |
| CL-bench | Not measured | 19.8% | Only Qwen3.5 Plus 2026-04-20 measured |
| CL-bench Life | Not measured | 12.4% | Only Qwen3.5 Plus 2026-04-20 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 | Qwen3.5 Plus 2026-04-20 | 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
Qwen3.5 Plus 2026-04-20 costs less
Repository review
50K input + 3K output tokens
Qwen3.5 Plus 2026-04-20 costs less
Agent loop
200K input + 10K output tokens
Qwen3.5 Plus 2026-04-20 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 | Qwen3.5 Plus 2026-04-20 |
|---|---|---|
| Maker | NVIDIA | Qwen |
| Weights | Open weights | No public weights listed |
| Released | June 4, 2026 | April 27, 2026 |
| Context window | 262K | 1M |
| Input $/Mtok | $0.60 | $0.30 |
| Output $/Mtok | $2.40 | $1.80 |
| Coding index | 30.0 | 39.5 |
| Independent measurements behind it | 3 | 2 |
| Cost per solved task | Not computable | $1.35 |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Nemotron 3 Ultra better than Qwen3.5 Plus 2026-04-20 for coding?
Pick Qwen3.5 Plus 2026-04-20 for coding: it scores 39.5 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra, though on 2 benchmarks against 3. Pick Nemotron 3 Ultra for work measured by LiveCodeBench (Vals AI) or GPQA Diamond (Epoch AI run), where it leads.
Which is cheaper, Nemotron 3 Ultra or Qwen3.5 Plus 2026-04-20?
Nemotron 3 Ultra costs $0.60 per million input tokens and $2.40 per million output tokens; Qwen3.5 Plus 2026-04-20 costs $0.30 and $1.80. Cost per solved task is known for Qwen3.5 Plus 2026-04-20 only.
Which has the bigger context window, Nemotron 3 Ultra or Qwen3.5 Plus 2026-04-20?
Qwen3.5 Plus 2026-04-20, with 1M tokens against 262K.
How many benchmarks is the Nemotron 3 Ultra vs Qwen3.5 Plus 2026-04-20 comparison based on?
13 benchmarks have a result for both models as of October 23, 2026. Nemotron 3 Ultra's coding index rests on 3 independent benchmarks and Qwen3.5 Plus 2026-04-20's on 2. Where only one model has a result, the page says so instead of naming a winner.