Enter opens the highlighted result. Esc closes.

DeepSeek V4 Flash 0731 vs Nemotron 3 Ultra

DeepSeek V4 Flash 0731 leads Nemotron 3 Ultra on coding, 51.8 to 30.0 on the Vibe Coding Index, and DeepSeek V4 Flash 0731 costs 6.1x less per output token ($0.396 vs $2.40 per million). Updated October 23, 2026; 39 benchmarks have a result for both.

Replace DeepSeek V4 Flash 0731 Replace Nemotron 3 Ultra
DeepSeek V4 Flash 0731DeepSeek
Coding
51.8
Overall
55.2
Output $/M
$0.396
34
Nemotron 3 UltraNVIDIA
Coding
30.0
Overall
53.1
Output $/M
$2.40
4
vs boards won of 39 shared, 1 tied

DeepSeek V4 Flash 0731 or Nemotron 3 Ultra: which to pick

Pick DeepSeek V4 Flash 0731 for coding: it scores 51.8 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra.

Pick Nemotron 3 Ultra for work measured by LegalBench (Vals AI) or CorpFin (Vals AI), where it leads.

Model ADeepSeek V4 Flash 0731DeepSeek51.8/1004 independent benchmarks$0.01 per solved taskModel BNemotron 3 UltraNVIDIA30.0/1003 independent benchmarksNo cost per solved task
Shared results
39
DeepSeek V4 Flash 0731 only
16
Nemotron 3 Ultra only
32
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
DeepSeek V4 Flash 0731 51.8 from 4 benchmarks, Nemotron 3 Ultra 30.0 from 3 benchmarks.
Widest category
Math, 30.9 points apart on average over 2 shared benchmarks.
Widest single gap
Vibe Code Bench (Vals AI): DeepSeek V4 Flash 0731 74.7% against Nemotron 3 Ultra 7.6%, 67.1 points apart on a 0 to 100 scale.
Output price
DeepSeek V4 Flash 0731 $0.396 against Nemotron 3 Ultra $2.40 per million output tokens, 6.1x apart.
Context window
DeepSeek V4 Flash 0731 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
CategoryDeepSeek V4 Flash 0731BarsNemotron 3 UltraTies
Coding901 tie
Intelligence20
Agentic work40
Reasoning50
Math20
Knowledge23
Web design71
General30
All shared boards3441 tie
CodingLike-for-likeSix of these boards feed the Vibe Coding Index90
Coding benchmarks for DeepSeek V4 Flash 0731 and Nemotron 3 Ultra
BenchmarkDeepSeek V4 Flash 0731Nemotron 3 UltraLeader
AA Coding Index69.149.3DeepSeek V4 Flash 0731
LiveCodeBench (Vals AI)87.3%86.0%DeepSeek V4 Flash 0731
SWE-bench Verified (Vals AI)88.8%69.0%DeepSeek V4 Flash 0731
Terminal-Bench 4 (Vals AI)18.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
Vibe Code Bench (Vals AI)74.7%7.6%DeepSeek V4 Flash 0731
Code migration (Vals AI)38.6%4.9%DeepSeek V4 Flash 0731
ProgramBench (Vals AI)0.0%0.0%Tie
IOI (Vals AI)32.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
Terminal-Bench 2.1 (Vals AI)67.0%50.9%DeepSeek V4 Flash 0731
SkillsBench (Vals AI)50.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
CyberBench (Vals AI)72.1%Not measuredOnly DeepSeek V4 Flash 0731 measured
SciCode50.3%40.3%DeepSeek V4 Flash 0731
Terminal-Bench Hard (Artificial Analysis run)Not measured36.4%Only Nemotron 3 Ultra measured
FrontierCode18.8%13.6%DeepSeek V4 Flash 0731
WeirdML63.0%43.5%DeepSeek V4 Flash 0731
ALE-Bench1306.1Not measuredOnly DeepSeek V4 Flash 0731 measured
LMArena Text: codingNot measured1467Only Nemotron 3 Ultra measured
LMArena Text: software and ITNot measured1468Only Nemotron 3 Ultra measured
Neither model has a result on the other 25 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for DeepSeek V4 Flash 0731 and Nemotron 3 Ultra
BenchmarkDeepSeek V4 Flash 0731Nemotron 3 UltraLeader
AA Intelligence Index34.322.9DeepSeek V4 Flash 0731
Epoch Capabilities Index154.8146.0DeepSeek V4 Flash 0731
Agentic workLike-for-likePublic boards, shown as published, kept out of the index40
Agentic work benchmarks for DeepSeek V4 Flash 0731 and Nemotron 3 Ultra
BenchmarkDeepSeek V4 Flash 0731Nemotron 3 UltraLeader
AA Agentic Index41.020.1DeepSeek V4 Flash 0731
Finance Agent (Vals AI)49.5%37.7%DeepSeek V4 Flash 0731
Tax Agent Bench (Vals AI)28.1%Not measuredOnly DeepSeek V4 Flash 0731 measured
Legal Research Bench (Vals AI)30.3%15.4%DeepSeek V4 Flash 0731
Excel Modeling Benchmark (Vals AI)57.0%31.7%DeepSeek V4 Flash 0731
BioMysteryBench (Vals AI)64.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
Terminal-Bench-Science (Vals AI)4.3%Not measuredOnly DeepSeek V4 Flash 0731 measured
τ²-Bench TelecomNot measured83.3%Only Nemotron 3 Ultra measured
APEX-AgentsNot measured22.7%Only Nemotron 3 Ultra measured
MCP AtlasNot measured63.1%Only Nemotron 3 Ultra measured
Neither model has a result on the other 32 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index50
Reasoning benchmarks for DeepSeek V4 Flash 0731 and Nemotron 3 Ultra
BenchmarkDeepSeek V4 Flash 0731Nemotron 3 UltraLeader
GPQA Diamond89.9%86.1%DeepSeek V4 Flash 0731
GPQA Diamond (Artificial Analysis run)90.8%86.7%DeepSeek V4 Flash 0731
Humanity's Last Exam (Artificial Analysis run)38.6%28.4%DeepSeek V4 Flash 0731
GPQA Diamond (Epoch AI run)91.0%85.4%DeepSeek V4 Flash 0731
ARC-AGI89.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
ARC-AGI-261.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
SimpleBench61.1%Not measuredOnly DeepSeek V4 Flash 0731 measured
Chess puzzles32.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
Mystery game puzzles34.0%20.0%DeepSeek V4 Flash 0731
LMArena Text: hard promptsNot measured1452Only Nemotron 3 Ultra measured
LMArena Text: expertNot measured1472Only Nemotron 3 Ultra measured
LMArena Text: hard prompts in EnglishNot measured1453Only Nemotron 3 Ultra measured
Neither model has a result on the other 11 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index20
Math benchmarks for DeepSeek V4 Flash 0731 and Nemotron 3 Ultra
BenchmarkDeepSeek V4 Flash 0731Nemotron 3 UltraLeader
OTIS Mock AIME94.4%86.7%DeepSeek V4 Flash 0731
FrontierMath, tiers 1 to 357.5%Not measuredOnly DeepSeek V4 Flash 0731 measured
FrontierMath, tier 424.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
ProofBench56.0%2.0%DeepSeek V4 Flash 0731
LMArena Text: mathNot measured1457Only Nemotron 3 Ultra measured
LMArena Text: mathematical workNot measured1462Only Nemotron 3 Ultra measured
Neither model has a result on the other 8 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index23
Knowledge benchmarks for DeepSeek V4 Flash 0731 and Nemotron 3 Ultra
BenchmarkDeepSeek V4 Flash 0731Nemotron 3 UltraLeader
MMLU Pro86.2%85.8%DeepSeek V4 Flash 0731
LegalBench (Vals AI)77.7%82.1%Nemotron 3 Ultra
CorpFin (Vals AI)61.9%65.5%Nemotron 3 Ultra
TaxEval (Vals AI)70.7%73.1%Nemotron 3 Ultra
MedCode (Vals AI)41.4%38.6%DeepSeek V4 Flash 0731
SimpleQA Verified33.6%Not measuredOnly DeepSeek V4 Flash 0731 measured
LMArena Text: scienceNot measured1465Only Nemotron 3 Ultra measured
LMArena Text: medicine and healthcareNot measured1455Only Nemotron 3 Ultra measured
LMArena Text: legal and governmentNot measured1453Only Nemotron 3 Ultra measured
LMArena Text: business and financeNot measured1435Only Nemotron 3 Ultra measured
Neither model has a result on the other 10 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index71
Web design benchmarks for DeepSeek V4 Flash 0731 and Nemotron 3 Ultra
BenchmarkDeepSeek V4 Flash 0731Nemotron 3 UltraLeader
Design Arena: websites12381145DeepSeek V4 Flash 0731
Design Arena: UI components12331135DeepSeek V4 Flash 0731
Design Arena: game dev12071138DeepSeek V4 Flash 0731
Design Arena: data viz11811142DeepSeek V4 Flash 0731
Design Arena: 3D12091132DeepSeek V4 Flash 0731
Design Arena: all code categories12291146DeepSeek V4 Flash 0731
Design Arena: SVG11841069DeepSeek V4 Flash 0731
Design Arena: ASCII art10901100Nemotron 3 Ultra
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index30
General benchmarks for DeepSeek V4 Flash 0731 and Nemotron 3 Ultra
BenchmarkDeepSeek V4 Flash 0731Nemotron 3 UltraLeader
MedScribe (Vals AI)80.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
IFBenchNot measured81.4%Only Nemotron 3 Ultra measured
Long context reasoning (AA-LCR)79.7%79.3%DeepSeek V4 Flash 0731
DTBench90.9%90.1%DeepSeek V4 Flash 0731
LMCA41.7%36.9%DeepSeek V4 Flash 0731
LMArena TextNot measured1445Only Nemotron 3 Ultra measured
LMArena Text: instruction followingNot measured1418Only Nemotron 3 Ultra measured
LMArena Text: creative writingNot measured1398Only Nemotron 3 Ultra measured
LMArena Text: EnglishNot measured1454Only Nemotron 3 Ultra measured
LMArena Text: non-EnglishNot measured1427Only Nemotron 3 Ultra measured
LMArena Text: ChineseNot measured1498Only Nemotron 3 Ultra measured
LMArena Text: GermanNot measured1474Only Nemotron 3 Ultra measured
LMArena Text: KoreanNot measured1385Only Nemotron 3 Ultra measured
LMArena Text: FrenchNot measured1473Only Nemotron 3 Ultra measured
LMArena Text: SpanishNot measured1454Only Nemotron 3 Ultra measured
LMArena Text: RussianNot measured1417Only Nemotron 3 Ultra measured
LMArena Text: PolishNot measured1385Only Nemotron 3 Ultra measured
LMArena Text: multi-turnNot measured1411Only Nemotron 3 Ultra measured
LMArena Text: longer queriesNot measured1437Only Nemotron 3 Ultra measured
LMArena Text: writing and languageNot measured1405Only Nemotron 3 Ultra measured
LMArena Text: entertainment and mediaNot measured1397Only 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
Image generation benchmarks for DeepSeek V4 Flash 0731 and Nemotron 3 Ultra
BenchmarkDeepSeek V4 Flash 0731Nemotron 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

DeepSeek V4 Flash 0731$0.0003Fits in one request
Nemotron 3 Ultra$0.0018Fits in one request

DeepSeek V4 Flash 0731 costs less

Repository review

50K input + 3K output tokens

DeepSeek V4 Flash 0731$0.0082Fits in one request
Nemotron 3 Ultra$0.037Fits in one request

DeepSeek V4 Flash 0731 costs less

Agent loop

200K input + 10K output tokens

DeepSeek V4 Flash 0731$0.032Fits in one request
Nemotron 3 Ultra$0.144Fits in one request

DeepSeek V4 Flash 0731 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 DeepSeek V4 Flash 0731 and Nemotron 3 Ultra
SpecificationDeepSeek V4 Flash 0731NVIDIA Nemotron 3 Ultra
MakerDeepSeekNVIDIA
WeightsOpen weightsOpen weights
ReleasedJuly 31, 2026June 4, 2026
Context window1.05M262K
Input $/Mtok$0.14$0.60
Output $/Mtok$0.396$2.40
Coding index51.830.0
Independent measurements behind it43
Cost per solved task$0.01Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is DeepSeek V4 Flash 0731 better than Nemotron 3 Ultra for coding?

Pick DeepSeek V4 Flash 0731 for coding: it scores 51.8 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra. Pick Nemotron 3 Ultra for work measured by LegalBench (Vals AI) or CorpFin (Vals AI), where it leads.

Which is cheaper, DeepSeek V4 Flash 0731 or Nemotron 3 Ultra?

DeepSeek V4 Flash 0731 costs $0.14 per million input tokens and $0.396 per million output tokens; Nemotron 3 Ultra costs $0.60 and $2.40. Cost per solved task is known for DeepSeek V4 Flash 0731 only.

Which has the bigger context window, DeepSeek V4 Flash 0731 or Nemotron 3 Ultra?

DeepSeek V4 Flash 0731, with 1.05M tokens against 262K.

How many benchmarks is the DeepSeek V4 Flash 0731 vs Nemotron 3 Ultra comparison based on?

39 benchmarks have a result for both models as of October 23, 2026. DeepSeek V4 Flash 0731's coding index rests on 4 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.

Compare next

Embed this comparison on your site

Free under CC BY 4.0, while the source link stays visible. Preview the frame · Terms and other embeds

<iframe src="https://llmbenchmark.ai/embed/compare/deepseek-v4-flash-0731-vs-nvidia-nemotron-3-ultra-550b-a55b" title="DeepSeek V4 Flash 0731 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/deepseek-v4-flash-0731-vs-nvidia-nemotron-3-ultra-550b-a55b">LLMBenchmark.ai, DeepSeek V4 Flash 0731 vs Nemotron 3 Ultra</a></p>