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DeepSeek V4 Flash 0423 vs Nemotron 3 Ultra

DeepSeek V4 Flash 0423 leads Nemotron 3 Ultra on the Artificial Analysis Intelligence Index, 24.4 to 22.9, and DeepSeek V4 Flash 0423 costs 8.6x less per output token ($0.28 vs $2.40 per million). Updated October 22, 2026; 42 benchmarks have a result for both.

Replace DeepSeek V4 Flash 0423 Replace Nemotron 3 Ultra
DeepSeek V4 Flash 0423DeepSeek
Coding
No data
Overall
No data
Output $/M
$0.28
19
Nemotron 3 UltraNVIDIA
Coding
30.0
Overall
53.1
Output $/M
$2.40
23
vs boards won of 42 shared

DeepSeek V4 Flash 0423 or Nemotron 3 Ultra: which to pick

Only Nemotron 3 Ultra has a coding score, 30.0 on the Vibe Coding Index; DeepSeek V4 Flash 0423 has none, so the two cannot be ranked on coding.

Pick DeepSeek V4 Flash 0423 for output tokens 8.6x cheaper ($0.28 vs $2.40 per million) and a larger context window (1.05M against 262K tokens).

Model ADeepSeek V4 Flash 0423DeepSeekNot benchmarked1 independent benchmarkNo cost per solved taskModel BNemotron 3 UltraNVIDIA30.0/1003 independent benchmarksNo cost per solved task
Shared results
42
DeepSeek V4 Flash 0423 only
8
Nemotron 3 Ultra only
29
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 0423 not benchmarked, Nemotron 3 Ultra 30.0 from 3 benchmarks.
Widest category
Agentic work, 6.2 points apart on average over 1 shared benchmark.
Widest single gap
Design Arena: SVG: DeepSeek V4 Flash 0423 1154 against Nemotron 3 Ultra 1069, 10.6 points apart on a 0 to 100 scale.
Output price
DeepSeek V4 Flash 0423 $0.28 against Nemotron 3 Ultra $2.40 per million output tokens, 8.6x apart.
Context window
DeepSeek V4 Flash 0423 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 0423BarsNemotron 3 UltraTies
Coding22
Intelligence20
Agentic work10
Reasoning03
Math02
Knowledge04
Web design71
General711
All shared boards1923
CodingLike-for-likeSix of these boards feed the Vibe Coding Index22
Coding benchmarks for DeepSeek V4 Flash 0423 and Nemotron 3 Ultra
BenchmarkDeepSeek V4 Flash 0423Nemotron 3 UltraLeader
LMArena WebDev1582Not measuredOnly DeepSeek V4 Flash 0423 measured
AA Coding Index52.049.3DeepSeek V4 Flash 0423
LiveCodeBench (Vals AI)Not measured86.0%Only Nemotron 3 Ultra measured
SWE-bench Verified (Vals AI)Not measured69.0%Only Nemotron 3 Ultra measured
Vibe Code Bench (Vals AI)Not measured7.6%Only Nemotron 3 Ultra measured
Code migration (Vals AI)Not measured4.9%Only Nemotron 3 Ultra measured
ProgramBench (Vals AI)Not measured0.0%Only Nemotron 3 Ultra measured
Terminal-Bench 2.1 (Vals AI)Not measured50.9%Only Nemotron 3 Ultra measured
SciCodeNot measured40.3%Only Nemotron 3 Ultra measured
Terminal-Bench Hard (Artificial Analysis run)Not measured36.4%Only Nemotron 3 Ultra measured
FrontierCodeNot measured13.6%Only Nemotron 3 Ultra measured
WeirdML45.6%43.5%DeepSeek V4 Flash 0423
ALE-Bench678.2Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: coding14571468Nemotron 3 Ultra
LMArena Text: software and IT14531468Nemotron 3 Ultra
LMArena WebDev: React1585Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena WebDev: HTML1558Not measuredOnly DeepSeek V4 Flash 0423 measured
Neither model has a result on the other 26 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for DeepSeek V4 Flash 0423 and Nemotron 3 Ultra
BenchmarkDeepSeek V4 Flash 0423Nemotron 3 UltraLeader
AA Intelligence Index24.422.9DeepSeek V4 Flash 0423
Epoch Capabilities Index146.1146.0DeepSeek V4 Flash 0423
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for DeepSeek V4 Flash 0423 and Nemotron 3 Ultra
BenchmarkDeepSeek V4 Flash 0423Nemotron 3 UltraLeader
AA Agentic Index26.320.1DeepSeek V4 Flash 0423
Finance Agent (Vals AI)Not measured37.7%Only Nemotron 3 Ultra measured
Legal Research Bench (Vals AI)Not measured15.4%Only Nemotron 3 Ultra measured
Excel Modeling Benchmark (Vals AI)Not measured31.7%Only Nemotron 3 Ultra 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 35 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index03
Reasoning benchmarks for DeepSeek V4 Flash 0423 and Nemotron 3 Ultra
BenchmarkDeepSeek V4 Flash 0423Nemotron 3 UltraLeader
GPQA DiamondNot measured86.1%Only Nemotron 3 Ultra measured
GPQA Diamond (Artificial Analysis run)Not measured86.7%Only Nemotron 3 Ultra measured
Humanity's Last Exam (Artificial Analysis run)Not measured28.4%Only Nemotron 3 Ultra measured
GPQA Diamond (Epoch AI run)Not measured85.4%Only Nemotron 3 Ultra measured
SimpleBench46.3%Not measuredOnly DeepSeek V4 Flash 0423 measured
Mystery game puzzlesNot measured20.0%Only Nemotron 3 Ultra measured
LMArena Text: hard prompts14441452Nemotron 3 Ultra
LMArena Text: expert14411472Nemotron 3 Ultra
LMArena Text: hard prompts in English14491453Nemotron 3 Ultra
Kagi LLM Benchmark52.2%Not measuredOnly DeepSeek V4 Flash 0423 measured
Neither model has a result on the other 13 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index02
Math benchmarks for DeepSeek V4 Flash 0423 and Nemotron 3 Ultra
BenchmarkDeepSeek V4 Flash 0423Nemotron 3 UltraLeader
OTIS Mock AIMENot measured86.7%Only Nemotron 3 Ultra measured
ProofBenchNot measured2.0%Only Nemotron 3 Ultra measured
LMArena Text: math14261457Nemotron 3 Ultra
LMArena Text: mathematical work14321461Nemotron 3 Ultra
MathArena24.8%Not measuredOnly DeepSeek V4 Flash 0423 measured
Neither model has a result on the other 9 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index04
Knowledge benchmarks for DeepSeek V4 Flash 0423 and Nemotron 3 Ultra
BenchmarkDeepSeek V4 Flash 0423Nemotron 3 UltraLeader
MMLU ProNot measured85.8%Only Nemotron 3 Ultra measured
LegalBench (Vals AI)Not measured82.1%Only Nemotron 3 Ultra measured
CorpFin (Vals AI)Not measured65.5%Only Nemotron 3 Ultra measured
TaxEval (Vals AI)Not measured73.1%Only Nemotron 3 Ultra measured
MedCode (Vals AI)Not measured38.6%Only Nemotron 3 Ultra measured
LMArena Text: science14461465Nemotron 3 Ultra
LMArena Text: medicine and healthcare14481456Nemotron 3 Ultra
LMArena Text: legal and government14391452Nemotron 3 Ultra
LMArena Text: business and finance14251434Nemotron 3 Ultra
Neither model has a result on the other 11 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index71
Web design benchmarks for DeepSeek V4 Flash 0423 and Nemotron 3 Ultra
BenchmarkDeepSeek V4 Flash 0423Nemotron 3 UltraLeader
Design Arena: websites12071145DeepSeek V4 Flash 0423
Design Arena: UI components11621135DeepSeek V4 Flash 0423
Design Arena: game dev11961138DeepSeek V4 Flash 0423
Design Arena: data viz11271141Nemotron 3 Ultra
Design Arena: 3D11881131DeepSeek V4 Flash 0423
Design Arena: all code categories12051146DeepSeek V4 Flash 0423
Design Arena: SVG11541069DeepSeek V4 Flash 0423
Design Arena: ASCII art11091100DeepSeek V4 Flash 0423
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index711
General benchmarks for DeepSeek V4 Flash 0423 and Nemotron 3 Ultra
BenchmarkDeepSeek V4 Flash 0423Nemotron 3 UltraLeader
IFBenchNot measured81.4%Only Nemotron 3 Ultra measured
Long context reasoning (AA-LCR)Not measured79.3%Only Nemotron 3 Ultra measured
DTBench86.4%90.1%Nemotron 3 Ultra
LMCA35.9%36.9%Nemotron 3 Ultra
LMArena Text14321445Nemotron 3 Ultra
LMArena Text: instruction following14211418DeepSeek V4 Flash 0423
LMArena Text: creative writing14031399DeepSeek V4 Flash 0423
LMArena Text: English14411455Nemotron 3 Ultra
LMArena Text: non-English14191427Nemotron 3 Ultra
LMArena Text: Chinese14631497Nemotron 3 Ultra
LMArena Text: German14191472Nemotron 3 Ultra
LMArena Text: Japanese1389Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: Korean13831384Nemotron 3 Ultra
LMArena Text: French14391472Nemotron 3 Ultra
LMArena Text: Spanish14361455Nemotron 3 Ultra
LMArena Text: Russian14271417DeepSeek V4 Flash 0423
LMArena Text: Polish14361385DeepSeek V4 Flash 0423
LMArena Text: multi-turn14491411DeepSeek V4 Flash 0423
LMArena Text: longer queries14341437Nemotron 3 Ultra
LMArena Text: writing and language14101406DeepSeek V4 Flash 0423
LMArena Text: entertainment and media14001397DeepSeek V4 Flash 0423
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 0423 and Nemotron 3 Ultra
BenchmarkDeepSeek V4 Flash 0423Nemotron 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 0423$0.0003Fits in one request
Nemotron 3 Ultra$0.0018Fits in one request

DeepSeek V4 Flash 0423 costs less

Repository review

50K input + 3K output tokens

DeepSeek V4 Flash 0423$0.0073Fits in one request
Nemotron 3 Ultra$0.037Fits in one request

DeepSeek V4 Flash 0423 costs less

Agent loop

200K input + 10K output tokens

DeepSeek V4 Flash 0423$0.029Fits in one request
Nemotron 3 Ultra$0.144Fits in one request

DeepSeek V4 Flash 0423 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 0423 and Nemotron 3 Ultra
SpecificationDeepSeek V4 Flash 0423NVIDIA Nemotron 3 Ultra
MakerDeepSeekNVIDIA
WeightsOpen weightsOpen weights
ReleasedApril 24, 2026June 4, 2026
Context window1.05M262K
Input $/Mtok$0.13$0.60
Output $/Mtok$0.28$2.40
Coding indexNot benchmarked30.0
Independent measurements behind it13
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is DeepSeek V4 Flash 0423 better than Nemotron 3 Ultra for coding?

Only Nemotron 3 Ultra has a coding score, 30.0 on the Vibe Coding Index; DeepSeek V4 Flash 0423 has none, so the two cannot be ranked on coding. Pick DeepSeek V4 Flash 0423 for output tokens 8.6x cheaper ($0.28 vs $2.40 per million) and a larger context window (1.05M against 262K tokens).

Which is cheaper, DeepSeek V4 Flash 0423 or Nemotron 3 Ultra?

DeepSeek V4 Flash 0423 costs $0.13 per million input tokens and $0.28 per million output tokens; Nemotron 3 Ultra costs $0.60 and $2.40. Cost per solved task is known for neither of them.

Which has the bigger context window, DeepSeek V4 Flash 0423 or Nemotron 3 Ultra?

DeepSeek V4 Flash 0423, with 1.05M tokens against 262K.

How many benchmarks is the DeepSeek V4 Flash 0423 vs Nemotron 3 Ultra comparison based on?

42 benchmarks have a result for both models as of October 22, 2026. DeepSeek V4 Flash 0423's coding index rests on 1 independent benchmark and Nemotron 3 Ultra's on 3. Where only one model has a result, the page says so instead of naming a winner.

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