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Nemotron 3 Ultra vs Qwen3.5-Flash

Qwen3.5-Flash leads Nemotron 3 Ultra on coding, 41.1 to 30.0 on the Vibe Coding Index, and Qwen3.5-Flash costs 9.2x less per output token ($0.26 vs $2.40 per million). Updated October 23, 2026; 41 benchmarks have a result for both.

Replace Nemotron 3 Ultra Replace Qwen3.5-Flash
Nemotron 3 UltraNVIDIA
Coding
30.0
Overall
53.1
Output $/M
$2.40
39
Qwen3.5-FlashQwen
Coding
41.1
Overall
50.1
Output $/M
$0.26
1
vs boards won of 41 shared, 1 tied

Nemotron 3 Ultra or Qwen3.5-Flash: which to pick

Pick Qwen3.5-Flash for coding: it scores 41.1 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 SWE-bench Verified (Vals AI), where it leads.

Model ANemotron 3 UltraNVIDIA30.0/1003 independent benchmarksNo cost per solved taskModel BQwen3.5-FlashQwen41.1/1002 independent benchmarks$0.40 per solved task
Shared results
41
Nemotron 3 Ultra only
30
Qwen3.5-Flash only
14
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.

At a glance

Coding index
Nemotron 3 Ultra 30.0 from 3 benchmarks, Qwen3.5-Flash 41.1 from 2 benchmarks.
Widest category
General, 7.6 points apart on average over 18 shared benchmarks.
Widest single gap
LMArena Text: German: Nemotron 3 Ultra 1474 against Qwen3.5-Flash 1391, 13.9 points apart on a 0 to 100 scale.
Output price
Nemotron 3 Ultra $2.40 against Qwen3.5-Flash $0.26 per million output tokens, 9.2x apart.
Context window
Nemotron 3 Ultra takes 262K tokens, Qwen3.5-Flash 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.

Boards won, where both have a result
CategoryNemotron 3 UltraBarsQwen3.5-FlashTies
Coding40
Intelligence10
Reasoning501 tie
Math30
Knowledge81
General180
All shared boards3911 tie
CodingLike-for-likeSix of these boards feed the Vibe Coding Index40
Coding benchmarks for Nemotron 3 Ultra and Qwen3.5-Flash
BenchmarkNemotron 3 UltraQwen3.5-FlashLeader
LMArena WebDevNot measured1244Only Qwen3.5-Flash measured
AA Coding Index49.3Not measuredOnly Nemotron 3 Ultra measured
LiveCodeBench (Vals AI)86.0%83.3%Nemotron 3 Ultra
SWE-bench Verified (Vals AI)69.0%64.4%Nemotron 3 Ultra
Vibe Code Bench (Vals AI)7.6%Not measuredOnly Nemotron 3 Ultra measured
Code migration (Vals AI)4.9%Not measuredOnly Nemotron 3 Ultra measured
ProgramBench (Vals AI)0.0%Not measuredOnly Nemotron 3 Ultra measured
Terminal-Bench 2.1 (Vals AI)50.9%Not measuredOnly Nemotron 3 Ultra measured
SciCode40.3%Not measuredOnly Nemotron 3 Ultra measured
Terminal-Bench Hard (Artificial Analysis run)36.4%Not measuredOnly Nemotron 3 Ultra measured
FrontierCode13.6%Not measuredOnly Nemotron 3 Ultra measured
WeirdML43.5%Not measuredOnly Nemotron 3 Ultra measured
ALE-BenchNot measured265.9Only Qwen3.5-Flash measured
LMArena Text: coding14671412Nemotron 3 Ultra
LMArena Text: software and IT14681416Nemotron 3 Ultra
LMArena WebDev: ReactNot measured1229Only Qwen3.5-Flash measured
LMArena WebDev: HTMLNot measured1291Only Qwen3.5-Flash measured
Neither model has a result on the other 26 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
Intelligence benchmarks for Nemotron 3 Ultra and Qwen3.5-Flash
BenchmarkNemotron 3 UltraQwen3.5-FlashLeader
AA Intelligence Index22.9Not measuredOnly Nemotron 3 Ultra measured
Epoch Capabilities Index146.0143.5Nemotron 3 Ultra
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index7 boards, none shared
Agentic work benchmarks for Nemotron 3 Ultra and Qwen3.5-Flash
BenchmarkNemotron 3 UltraQwen3.5-FlashLeader
AA Agentic Index20.1Not measuredOnly Nemotron 3 Ultra measured
Finance Agent (Vals AI)37.7%Not measuredOnly Nemotron 3 Ultra measured
Legal Research Bench (Vals AI)15.4%Not measuredOnly Nemotron 3 Ultra measured
Excel Modeling Benchmark (Vals AI)31.7%Not measuredOnly Nemotron 3 Ultra measured
τ²-Bench Telecom83.3%Not measuredOnly Nemotron 3 Ultra measured
APEX-Agents22.7%Not measuredOnly Nemotron 3 Ultra measured
MCP Atlas63.1%Not measuredOnly Nemotron 3 Ultra measured
Neither model has a result on the other 35 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index50
Reasoning benchmarks for Nemotron 3 Ultra and Qwen3.5-Flash
BenchmarkNemotron 3 UltraQwen3.5-FlashLeader
GPQA Diamond86.1%82.8%Nemotron 3 Ultra
MMMU Pro (Vals AI)Not measured81.9%Only Qwen3.5-Flash measured
GPQA Diamond (Artificial Analysis run)86.7%Not measuredOnly Nemotron 3 Ultra measured
Humanity's Last Exam (Artificial Analysis run)28.4%Not measuredOnly Nemotron 3 Ultra measured
GPQA Diamond (Epoch AI run)85.4%82.3%Nemotron 3 Ultra
Chess puzzlesNot measured14.0%Only Qwen3.5-Flash measured
Mystery game puzzles20.0%20.0%Tie
LMArena Text: hard prompts14521403Nemotron 3 Ultra
LMArena Text: expert14721407Nemotron 3 Ultra
LMArena Text: hard prompts in English14531409Nemotron 3 Ultra
Neither model has a result on the other 13 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index30
Math benchmarks for Nemotron 3 Ultra and Qwen3.5-Flash
BenchmarkNemotron 3 UltraQwen3.5-FlashLeader
AIMENot measured92.5%Only Qwen3.5-Flash measured
OTIS Mock AIME86.7%84.4%Nemotron 3 Ultra
FrontierMath, tiers 1 to 3Not measured18.2%Only Qwen3.5-Flash measured
ProofBench2.0%Not measuredOnly Nemotron 3 Ultra measured
LMArena Text: math14571407Nemotron 3 Ultra
LMArena Text: mathematical work14621413Nemotron 3 Ultra
Neither model has a result on the other 8 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index81
Knowledge benchmarks for Nemotron 3 Ultra and Qwen3.5-Flash
BenchmarkNemotron 3 UltraQwen3.5-FlashLeader
MMLU Pro85.8%84.1%Nemotron 3 Ultra
LegalBench (Vals AI)82.1%84.3%Qwen3.5-Flash
CaseLaw (Vals AI)Not measured56.0%Only Qwen3.5-Flash measured
CorpFin (Vals AI)65.5%63.6%Nemotron 3 Ultra
TaxEval (Vals AI)73.1%72.2%Nemotron 3 Ultra
MortgageTax (Vals AI)Not measured67.4%Only Qwen3.5-Flash measured
MedCode (Vals AI)38.6%33.0%Nemotron 3 Ultra
SimpleQA VerifiedNot measured20.3%Only Qwen3.5-Flash measured
LMArena Text: science14651415Nemotron 3 Ultra
LMArena Text: medicine and healthcare14551407Nemotron 3 Ultra
LMArena Text: legal and government14531397Nemotron 3 Ultra
LMArena Text: business and finance14351394Nemotron 3 Ultra
Neither model has a result on the other 8 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Web design benchmarks for Nemotron 3 Ultra and Qwen3.5-Flash
BenchmarkNemotron 3 UltraQwen3.5-FlashLeader
Design Arena: websites1145Not measuredOnly Nemotron 3 Ultra measured
Design Arena: UI components1135Not measuredOnly Nemotron 3 Ultra measured
Design Arena: game dev1138Not measuredOnly Nemotron 3 Ultra measured
Design Arena: data viz1142Not measuredOnly Nemotron 3 Ultra measured
Design Arena: 3D1132Not measuredOnly Nemotron 3 Ultra measured
Design Arena: all code categories1146Not measuredOnly Nemotron 3 Ultra measured
Design Arena: SVG1069Not measuredOnly Nemotron 3 Ultra measured
Design Arena: ASCII art1100Not measuredOnly 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 index180
General benchmarks for Nemotron 3 Ultra and Qwen3.5-Flash
BenchmarkNemotron 3 UltraQwen3.5-FlashLeader
SAGE (Vals AI)Not measured42.5%Only Qwen3.5-Flash measured
MedScribe (Vals AI)Not measured70.6%Only Qwen3.5-Flash measured
IFBench81.4%Not measuredOnly Nemotron 3 Ultra measured
Long context reasoning (AA-LCR)79.3%Not measuredOnly Nemotron 3 Ultra measured
DTBench90.1%82.9%Nemotron 3 Ultra
LMCA36.9%29.1%Nemotron 3 Ultra
LMArena Text14451397Nemotron 3 Ultra
LMArena Text: instruction following14181375Nemotron 3 Ultra
LMArena Text: creative writing13981343Nemotron 3 Ultra
LMArena Text: English14541404Nemotron 3 Ultra
LMArena Text: non-English14271385Nemotron 3 Ultra
LMArena Text: Chinese14981446Nemotron 3 Ultra
LMArena Text: German14741391Nemotron 3 Ultra
LMArena Text: JapaneseNot measured1369Only Qwen3.5-Flash measured
LMArena Text: Korean13851344Nemotron 3 Ultra
LMArena Text: French14731413Nemotron 3 Ultra
LMArena Text: Spanish14541399Nemotron 3 Ultra
LMArena Text: Russian14171380Nemotron 3 Ultra
LMArena Text: Polish13851376Nemotron 3 Ultra
LMArena Text: multi-turn14111393Nemotron 3 Ultra
LMArena Text: longer queries14371392Nemotron 3 Ultra
LMArena Text: writing and language14051369Nemotron 3 Ultra
LMArena Text: entertainment and media13971347Nemotron 3 Ultra
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
Image generation benchmarks for Nemotron 3 Ultra and Qwen3.5-Flash
BenchmarkNemotron 3 UltraQwen3.5-FlashLeader
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$0.0018Fits in one request
Qwen3.5-Flash$0.0002Fits in one request

Qwen3.5-Flash costs less

Repository review

50K input + 3K output tokens

Nemotron 3 Ultra$0.037Fits in one request
Qwen3.5-Flash$0.0040Fits in one request

Qwen3.5-Flash costs less

Agent loop

200K input + 10K output tokens

Nemotron 3 Ultra$0.144Fits in one request
Qwen3.5-Flash$0.016Fits in one request

Qwen3.5-Flash 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 Nemotron 3 Ultra and Qwen3.5-Flash
SpecificationNVIDIA Nemotron 3 UltraQwen3.5-Flash
MakerNVIDIAQwen
WeightsOpen weightsNo public weights listed
ReleasedJune 4, 2026February 25, 2026
Context window262K1M
Input $/Mtok$0.60$0.065
Output $/Mtok$2.40$0.26
Coding index30.041.1
Independent measurements behind it32
Cost per solved taskNot computable$0.40
SourceOpenRouter listingOpenRouter listing

Questions

Is Nemotron 3 Ultra better than Qwen3.5-Flash for coding?

Pick Qwen3.5-Flash for coding: it scores 41.1 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 SWE-bench Verified (Vals AI), where it leads.

Which is cheaper, Nemotron 3 Ultra or Qwen3.5-Flash?

Nemotron 3 Ultra costs $0.60 per million input tokens and $2.40 per million output tokens; Qwen3.5-Flash costs $0.065 and $0.26. Cost per solved task is known for Qwen3.5-Flash only.

Which has the bigger context window, Nemotron 3 Ultra or Qwen3.5-Flash?

Qwen3.5-Flash, with 1M tokens against 262K.

How many benchmarks is the Nemotron 3 Ultra vs Qwen3.5-Flash comparison based on?

41 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-Flash's on 2. 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/nvidia-nemotron-3-ultra-550b-a55b-vs-qwen3-5-flash-02-23" title="Nemotron 3 Ultra vs Qwen3.5-Flash, 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/nvidia-nemotron-3-ultra-550b-a55b-vs-qwen3-5-flash-02-23">LLMBenchmark.ai, Nemotron 3 Ultra vs Qwen3.5-Flash</a></p>