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GPT-5 vs Nemotron 3 Ultra

GPT-5 leads Nemotron 3 Ultra on coding, 38.8 to 30.0 on the Vibe Coding Index, and Nemotron 3 Ultra costs 4.2x less per output token ($2.40 vs $10.00 per million). Updated October 22, 2026; 60 benchmarks have a result for both.

Replace GPT-5 Replace Nemotron 3 Ultra
GPT-5OpenAI
Coding
38.8
Overall
51.5
Output $/M
$10.00
26
Nemotron 3 UltraNVIDIA
Coding
30.0
Overall
53.1
Output $/M
$2.40
33
vs boards won of 60 shared, 1 tied

GPT-5 or Nemotron 3 Ultra: which to pick

Pick GPT-5 for coding: it scores 38.8 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra.

Pick Nemotron 3 Ultra for output tokens 4.2x cheaper ($2.40 vs $10.00 per million) and work measured by AA Coding Index or LiveCodeBench (Vals AI), where it leads.

Model AGPT-5OpenAI38.8/1003 independent benchmarks$0.39 per solved taskModel BNemotron 3 UltraNVIDIA30.0/1003 independent benchmarksNo cost per solved task
Shared results
60
GPT-5 only
57
Nemotron 3 Ultra only
11
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
GPT-5 38.8 from 3 benchmarks, Nemotron 3 Ultra 30.0 from 3 benchmarks.
Widest category
Math, 9.6 points apart on average over 4 shared benchmarks.
Widest single gap
WeirdML: GPT-5 60.7% against Nemotron 3 Ultra 43.5%, 17.3 points apart on a 0 to 100 scale.
Output price
GPT-5 $10.00 against Nemotron 3 Ultra $2.40 per million output tokens, 4.2x apart.
Context window
GPT-5 takes 400K 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
CategoryGPT-5BarsNemotron 3 UltraTies
Coding341 tie
Intelligence20
Agentic work10
Reasoning35
Math22
Knowledge45
Web design71
General416
All shared boards26331 tie
CodingLike-for-likeSix of these boards feed the Vibe Coding Index34
Coding benchmarks for GPT-5 and Nemotron 3 Ultra
BenchmarkGPT-5Nemotron 3 UltraLeader
Aider polyglot88.0%Not measuredOnly GPT-5 measured
SWE-bench Verified74.4%Not measuredOnly GPT-5 measured
LMArena WebDev1418Not measuredOnly GPT-5 measured
AA Coding Index37.849.3Nemotron 3 Ultra
LiveCodeBench (Vals AI)85.9%86.0%Nemotron 3 Ultra
SWE-bench Verified (Vals AI)69.0%69.0%Tie
Vibe Code Bench (Vals AI)20.1%7.6%GPT-5
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
LiveCodeBench (Artificial Analysis run)84.6%Not measuredOnly GPT-5 measured
SciCodeNot measured40.3%Only Nemotron 3 Ultra measured
Terminal-Bench Hard (Artificial Analysis run)37.9%36.4%GPT-5
Terminal-Bench49.6%Not measuredOnly GPT-5 measured
FrontierCodeNot measured13.6%Only Nemotron 3 Ultra measured
GSO-Bench6.9%Not measuredOnly GPT-5 measured
WeirdML60.7%43.5%GPT-5
ALE-Bench807.6Not measuredOnly GPT-5 measured
LMArena Text: coding14361468Nemotron 3 Ultra
LMArena Text: software and IT14201468Nemotron 3 Ultra
LMArena WebDev: HTML1427Not measuredOnly GPT-5 measured
SciCode0.0%Not measuredOnly GPT-5 measured
Neither model has a result on the other 21 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for GPT-5 and Nemotron 3 Ultra
BenchmarkGPT-5Nemotron 3 UltraLeader
AA Intelligence Index23.022.9GPT-5
Epoch Capabilities Index150.0146.0GPT-5
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for GPT-5 and Nemotron 3 Ultra
BenchmarkGPT-5Nemotron 3 UltraLeader
AA Agentic IndexNot measured20.1Only Nemotron 3 Ultra measured
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 Telecom86.5%83.3%GPT-5
APEX-AgentsNot measured22.7%Only Nemotron 3 Ultra measured
METR time horizons69.6%Not measuredOnly GPT-5 measured
Remote Labor Index1.7%Not measuredOnly GPT-5 measured
GDPval34.8%Not measuredOnly GPT-5 measured
BALROG32.8%Not measuredOnly GPT-5 measured
DeepResearch Bench49.6%Not measuredOnly GPT-5 measured
BrowseComp-Plus80.0%Not measuredOnly GPT-5 measured
MCP AtlasNot measured63.1%Only Nemotron 3 Ultra measured
Neither model has a result on the other 29 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index35
Reasoning benchmarks for GPT-5 and Nemotron 3 Ultra
BenchmarkGPT-5Nemotron 3 UltraLeader
GPQA Diamond85.6%86.1%Nemotron 3 Ultra
MMMU Pro (Vals AI)81.5%Not measuredOnly GPT-5 measured
GPQA Diamond (Artificial Analysis run)85.4%86.7%Nemotron 3 Ultra
Humanity's Last Exam (Artificial Analysis run)28.5%28.4%GPT-5
GPQA Diamond (Epoch AI run)86.2%85.4%GPT-5
ARC-AGI65.7%Not measuredOnly GPT-5 measured
ARC-AGI-29.9%Not measuredOnly GPT-5 measured
SimpleBench56.7%Not measuredOnly GPT-5 measured
Chess puzzles36.0%Not measuredOnly GPT-5 measured
Mystery game puzzles23.0%20.0%GPT-5
EBR-bench12.7%Not measuredOnly GPT-5 measured
VPCT66.0%Not measuredOnly GPT-5 measured
LMArena Text: hard prompts14151452Nemotron 3 Ultra
LMArena Text: expert14191472Nemotron 3 Ultra
LMArena Text: hard prompts in English14191453Nemotron 3 Ultra
LMArena Vision: diagrams1252Not measuredOnly GPT-5 measured
LMArena Vision: homework1278Not measuredOnly GPT-5 measured
Kagi LLM Benchmark72.7%Not measuredOnly GPT-5 measured
Neither model has a result on the other 5 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index22
Math benchmarks for GPT-5 and Nemotron 3 Ultra
BenchmarkGPT-5Nemotron 3 UltraLeader
AIME93.4%Not measuredOnly GPT-5 measured
MATH 500 (Vals AI)96.0%Not measuredOnly GPT-5 measured
MGSM (Vals AI)92.8%Not measuredOnly GPT-5 measured
AA Math Index94.3Not measuredOnly GPT-5 measured
AIME 2025 (Artificial Analysis run)94.3%Not measuredOnly GPT-5 measured
OTIS Mock AIME91.4%86.7%GPT-5
FrontierMath, tiers 1 to 355.4%Not measuredOnly GPT-5 measured
FrontierMath, tier 422.0%Not measuredOnly GPT-5 measured
ProofBench18.0%2.0%GPT-5
MATH level 598.1%Not measuredOnly GPT-5 measured
LMArena Text: math14071457Nemotron 3 Ultra
LMArena Text: mathematical work14051461Nemotron 3 Ultra
MathArena17.1%Not measuredOnly GPT-5 measured
Neither model has a result on the other 1 board here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index45
Knowledge benchmarks for GPT-5 and Nemotron 3 Ultra
BenchmarkGPT-5Nemotron 3 UltraLeader
MMLU Pro86.5%85.8%GPT-5
LegalBench (Vals AI)86.0%82.1%GPT-5
CaseLaw (Vals AI)66.5%Not measuredOnly GPT-5 measured
CorpFin (Vals AI)61.1%65.5%Nemotron 3 Ultra
TaxEval (Vals AI)73.4%73.1%GPT-5
MortgageTax (Vals AI)65.5%Not measuredOnly GPT-5 measured
MedQA (Vals AI)96.3%Not measuredOnly GPT-5 measured
MedCode (Vals AI)49.6%38.6%GPT-5
MMLU Pro (Artificial Analysis run)87.1%Not measuredOnly GPT-5 measured
SimpleQA Verified50.1%Not measuredOnly GPT-5 measured
GeoBench81.0%Not measuredOnly GPT-5 measured
LMArena Text: science14161465Nemotron 3 Ultra
LMArena Text: medicine and healthcare14131456Nemotron 3 Ultra
LMArena Text: legal and government14311452Nemotron 3 Ultra
LMArena Text: business and finance14001434Nemotron 3 Ultra
FACTS Benchmark Suite56.5%Not measuredOnly GPT-5 measured
PRBench Finance51.3%Not measuredOnly GPT-5 measured
PRBench Legal49.0%Not measuredOnly GPT-5 measured
Neither model has a result on the other 2 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index71
Web design benchmarks for GPT-5 and Nemotron 3 Ultra
BenchmarkGPT-5Nemotron 3 UltraLeader
Design Arena: websites11841145GPT-5
Design Arena: UI components11771135GPT-5
Design Arena: game dev11851138GPT-5
Design Arena: data viz12211141GPT-5
Design Arena: 3D10551131Nemotron 3 Ultra
Design Arena: all code categories11671146GPT-5
Design Arena: SVG11881069GPT-5
Design Arena: ASCII art11411100GPT-5
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index416
General benchmarks for GPT-5 and Nemotron 3 Ultra
BenchmarkGPT-5Nemotron 3 UltraLeader
SAGE (Vals AI)43.7%Not measuredOnly GPT-5 measured
MedScribe (Vals AI)83.7%Not measuredOnly GPT-5 measured
IFBench73.1%81.4%Nemotron 3 Ultra
Long context reasoning (AA-LCR)78.2%79.3%Nemotron 3 Ultra
DTBench90.7%90.1%GPT-5
LMCA40.0%36.9%GPT-5
Fiction.LiveBench97.2%Not measuredOnly GPT-5 measured
Creative writing (Lech Mazur)86.0%Not measuredOnly GPT-5 measured
LMArena Text14061445Nemotron 3 Ultra
LMArena Text: instruction following13881418Nemotron 3 Ultra
LMArena Text: creative writing13651399Nemotron 3 Ultra
LMArena Vision1232Not measuredOnly GPT-5 measured
LMArena Text: English14091455Nemotron 3 Ultra
LMArena Text: non-English13971427Nemotron 3 Ultra
LMArena Text: Chinese14221497Nemotron 3 Ultra
LMArena Text: German14161472Nemotron 3 Ultra
LMArena Text: Japanese1409Not measuredOnly GPT-5 measured
LMArena Text: Korean13601384Nemotron 3 Ultra
LMArena Text: French14091472Nemotron 3 Ultra
LMArena Text: Spanish13991455Nemotron 3 Ultra
LMArena Text: Russian14071417Nemotron 3 Ultra
LMArena Text: Polish14311385GPT-5
LMArena Text: multi-turn14261411GPT-5
LMArena Text: longer queries13991437Nemotron 3 Ultra
LMArena Text: writing and language13841406Nemotron 3 Ultra
LMArena Text: entertainment and media13791397Nemotron 3 Ultra
LMArena Vision: English1231Not measuredOnly GPT-5 measured
LMArena Vision: Chinese1267Not measuredOnly GPT-5 measured
LMArena Vision: reading text1246Not measuredOnly GPT-5 measured
LMArena Vision: humor1219Not measuredOnly GPT-5 measured
LMArena Vision: captioning1212Not measuredOnly GPT-5 measured
LMArena Vision: recognizing things1263Not measuredOnly GPT-5 measured
LMArena Vision: creative writing1210Not measuredOnly GPT-5 measured
MultiChallenge63.2%Not measuredOnly GPT-5 measured
Neither model has a result on the other 14 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for GPT-5 and Nemotron 3 Ultra
BenchmarkGPT-5Nemotron 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

GPT-5$0.0063Fits in one request
Nemotron 3 Ultra$0.0018Fits in one request

Nemotron 3 Ultra costs less

Repository review

50K input + 3K output tokens

GPT-5$0.092Fits in one request
Nemotron 3 Ultra$0.037Fits in one request

Nemotron 3 Ultra costs less

Agent loop

200K input + 10K output tokens

GPT-5$0.350Fits in one request
Nemotron 3 Ultra$0.144Fits in one request

Nemotron 3 Ultra 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 GPT-5 and Nemotron 3 Ultra
SpecificationOpenAI GPT-5NVIDIA Nemotron 3 Ultra
MakerOpenAINVIDIA
WeightsNo public weights listedOpen weights
ReleasedAugust 7, 2025June 4, 2026
Context window400K262K
Input $/Mtok$1.25$0.60
Output $/Mtok$10.00$2.40
Coding index38.830.0
Independent measurements behind it33
Cost per solved task$0.39Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-5 better than Nemotron 3 Ultra for coding?

Pick GPT-5 for coding: it scores 38.8 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra. Pick Nemotron 3 Ultra for output tokens 4.2x cheaper ($2.40 vs $10.00 per million) and work measured by AA Coding Index or LiveCodeBench (Vals AI), where it leads.

Which is cheaper, GPT-5 or Nemotron 3 Ultra?

GPT-5 costs $1.25 per million input tokens and $10.00 per million output tokens; Nemotron 3 Ultra costs $0.60 and $2.40. Cost per solved task is known for GPT-5 only.

Which has the bigger context window, GPT-5 or Nemotron 3 Ultra?

GPT-5, with 400K tokens against 262K.

How many benchmarks is the GPT-5 vs Nemotron 3 Ultra comparison based on?

60 benchmarks have a result for both models as of October 22, 2026. GPT-5's coding index rests on 3 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.

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<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/gpt-5-vs-nvidia-nemotron-3-ultra-550b-a55b">LLMBenchmark.ai, GPT-5 vs Nemotron 3 Ultra</a></p>