Enter opens the highlighted result. Esc closes.

DeepSeek V4 Flash 0731 vs Nemotron 3.5 Lightning

DeepSeek V4 Flash 0731 leads Nemotron 3.5 Lightning on coding, 51.8 to 22.6 on the Vibe Coding Index, and Nemotron 3.5 Lightning costs 2.7x less per output token ($0.147 vs $0.396 per million). Updated October 22, 2026; 20 benchmarks have a result for both.

Replace DeepSeek V4 Flash 0731 Replace Nemotron 3.5 Lightning
DeepSeek V4 Flash 0731DeepSeek
Coding
51.8
Overall
55.2
Output $/M
$0.396
19
Nemotron 3.5 LightningNVIDIA
Coding
22.6
Overall
No data
Output $/M
$0.147
0
vs boards won of 20 shared, 1 tied

DeepSeek V4 Flash 0731 or Nemotron 3.5 Lightning: which to pick

Pick DeepSeek V4 Flash 0731 for coding: it scores 51.8 on the Vibe Coding Index against 22.6 for Nemotron 3.5 Lightning.

Pick Nemotron 3.5 Lightning for output tokens 2.7x cheaper ($0.147 vs $0.396 per million).

Model ADeepSeek V4 Flash 0731DeepSeek51.8/1004 independent benchmarks$0.01 per solved taskModel BNemotron 3.5 LightningNVIDIA22.6/1002 independent benchmarks$0.06 per solved task
Shared results
20
DeepSeek V4 Flash 0731 only
35
Nemotron 3.5 Lightning only
0
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
DeepSeek V4 Flash 0731 51.8 from 4 benchmarks, Nemotron 3.5 Lightning 22.6 from 2 benchmarks.
Widest category
General, 47.7 points apart on average over 2 shared benchmarks.
Widest single gap
MedScribe (Vals AI): DeepSeek V4 Flash 0731 80.4% against Nemotron 3.5 Lightning 4.3%, 76.1 points apart on a 0 to 100 scale.
Output price
DeepSeek V4 Flash 0731 $0.396 against Nemotron 3.5 Lightning $0.147 per million output tokens, 2.7x apart.
Context window
DeepSeek V4 Flash 0731 takes 1.05M tokens, Nemotron 3.5 Lightning 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 3.5 LightningTies
Coding801 tie
Intelligence10
Agentic work50
Reasoning20
Knowledge10
General20
All shared boards1901 tie
CodingLike-for-likeSix of these boards feed the Vibe Coding Index80
Coding benchmarks for DeepSeek V4 Flash 0731 and Nemotron 3.5 Lightning
BenchmarkDeepSeek V4 Flash 0731Nemotron 3.5 LightningLeader
AA Coding Index69.126.8DeepSeek V4 Flash 0731
LiveCodeBench (Vals AI)87.3%Not measuredOnly DeepSeek V4 Flash 0731 measured
SWE-bench Verified (Vals AI)88.8%52.8%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%0.0%DeepSeek V4 Flash 0731
Code migration (Vals AI)38.6%3.0%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%10.9%DeepSeek V4 Flash 0731
SkillsBench (Vals AI)50.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
CyberBench (Vals AI)72.1%29.5%DeepSeek V4 Flash 0731
SciCode50.3%32.1%DeepSeek V4 Flash 0731
FrontierCode18.8%Not measuredOnly DeepSeek V4 Flash 0731 measured
WeirdML63.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
ALE-Bench1306.1769.2DeepSeek V4 Flash 0731
Neither model has a result on the other 24 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
Intelligence benchmarks for DeepSeek V4 Flash 0731 and Nemotron 3.5 Lightning
BenchmarkDeepSeek V4 Flash 0731Nemotron 3.5 LightningLeader
AA Intelligence Index34.312.9DeepSeek V4 Flash 0731
Epoch Capabilities Index154.8Not measuredOnly DeepSeek V4 Flash 0731 measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index50
Agentic work benchmarks for DeepSeek V4 Flash 0731 and Nemotron 3.5 Lightning
BenchmarkDeepSeek V4 Flash 0731Nemotron 3.5 LightningLeader
AA Agentic Index41.03.5DeepSeek V4 Flash 0731
Finance Agent (Vals AI)49.5%18.5%DeepSeek V4 Flash 0731
Tax Agent Bench (Vals AI)28.1%2.6%DeepSeek V4 Flash 0731
Legal Research Bench (Vals AI)30.3%2.9%DeepSeek V4 Flash 0731
Excel Modeling Benchmark (Vals AI)57.0%17.0%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
Neither model has a result on the other 34 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index20
Reasoning benchmarks for DeepSeek V4 Flash 0731 and Nemotron 3.5 Lightning
BenchmarkDeepSeek V4 Flash 0731Nemotron 3.5 LightningLeader
GPQA Diamond89.9%Not measuredOnly DeepSeek V4 Flash 0731 measured
GPQA Diamond (Artificial Analysis run)90.8%74.3%DeepSeek V4 Flash 0731
Humanity's Last Exam (Artificial Analysis run)38.6%10.6%DeepSeek V4 Flash 0731
GPQA Diamond (Epoch AI run)91.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
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%Not measuredOnly DeepSeek V4 Flash 0731 measured
Neither model has a result on the other 13 boards here
MathDirectional onlyPublic boards, shown as published, kept out of the index4 boards, none shared
Math benchmarks for DeepSeek V4 Flash 0731 and Nemotron 3.5 Lightning
BenchmarkDeepSeek V4 Flash 0731Nemotron 3.5 LightningLeader
OTIS Mock AIME94.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
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%Not measuredOnly DeepSeek V4 Flash 0731 measured
Neither model has a result on the other 9 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index10
Knowledge benchmarks for DeepSeek V4 Flash 0731 and Nemotron 3.5 Lightning
BenchmarkDeepSeek V4 Flash 0731Nemotron 3.5 LightningLeader
MMLU Pro86.2%Not measuredOnly DeepSeek V4 Flash 0731 measured
LegalBench (Vals AI)77.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
CorpFin (Vals AI)61.9%54.2%DeepSeek V4 Flash 0731
TaxEval (Vals AI)70.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
MedCode (Vals AI)41.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
SimpleQA Verified33.6%Not measuredOnly DeepSeek V4 Flash 0731 measured
Neither model has a result on the other 12 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Web design benchmarks for DeepSeek V4 Flash 0731 and Nemotron 3.5 Lightning
BenchmarkDeepSeek V4 Flash 0731Nemotron 3.5 LightningLeader
Design Arena: websites1237Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: UI components1233Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: game dev1207Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: data viz1180Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: 3D1208Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: all code categories1229Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: SVG1184Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: ASCII art1090Not measuredOnly DeepSeek V4 Flash 0731 measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index20
General benchmarks for DeepSeek V4 Flash 0731 and Nemotron 3.5 Lightning
BenchmarkDeepSeek V4 Flash 0731Nemotron 3.5 LightningLeader
MedScribe (Vals AI)80.4%4.3%DeepSeek V4 Flash 0731
Long context reasoning (AA-LCR)79.7%60.3%DeepSeek V4 Flash 0731
DTBench90.9%Not measuredOnly DeepSeek V4 Flash 0731 measured
LMCA41.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
Neither model has a result on the other 42 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 3.5 Lightning
BenchmarkDeepSeek V4 Flash 0731Nemotron 3.5 LightningLeader
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 3.5 Lightning$0.0001Fits in one request

Nemotron 3.5 Lightning costs less

Repository review

50K input + 3K output tokens

DeepSeek V4 Flash 0731$0.0082Fits in one request
Nemotron 3.5 Lightning$0.0031Fits in one request

Nemotron 3.5 Lightning costs less

Agent loop

200K input + 10K output tokens

DeepSeek V4 Flash 0731$0.032Fits in one request
Nemotron 3.5 Lightning$0.012Fits in one request

Nemotron 3.5 Lightning 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 3.5 Lightning
SpecificationDeepSeek V4 Flash 0731NVIDIA Nemotron 3.5 Lightning
MakerDeepSeekNVIDIA
WeightsOpen weightsOpen weights
ReleasedJuly 31, 2026August 11, 2026
Context window1.05M262K
Input $/Mtok$0.14$0.0534
Output $/Mtok$0.396$0.147
Coding index51.822.6
Independent measurements behind it42
Cost per solved task$0.01$0.06
SourceOpenRouter listingOpenRouter listing

Questions

Is DeepSeek V4 Flash 0731 better than Nemotron 3.5 Lightning for coding?

Pick DeepSeek V4 Flash 0731 for coding: it scores 51.8 on the Vibe Coding Index against 22.6 for Nemotron 3.5 Lightning. Pick Nemotron 3.5 Lightning for output tokens 2.7x cheaper ($0.147 vs $0.396 per million).

Which is cheaper, DeepSeek V4 Flash 0731 or Nemotron 3.5 Lightning?

DeepSeek V4 Flash 0731 costs $0.14 per million input tokens and $0.396 per million output tokens; Nemotron 3.5 Lightning costs $0.0534 and $0.147. Per solved SWE-bench Verified task, DeepSeek V4 Flash 0731 costs $0.01 and Nemotron 3.5 Lightning $0.06.

Which has the bigger context window, DeepSeek V4 Flash 0731 or Nemotron 3.5 Lightning?

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

How many benchmarks is the DeepSeek V4 Flash 0731 vs Nemotron 3.5 Lightning comparison based on?

20 benchmarks have a result for both models as of October 22, 2026. DeepSeek V4 Flash 0731's coding index rests on 4 independent benchmarks and Nemotron 3.5 Lightning's on 2. 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-3-5-lightning" title="DeepSeek V4 Flash 0731 vs Nemotron 3.5 Lightning, 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-3-5-lightning">LLMBenchmark.ai, DeepSeek V4 Flash 0731 vs Nemotron 3.5 Lightning</a></p>