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GPT-5 Nano vs Nemotron 3 Ultra

Nemotron 3 Ultra leads GPT-5 Nano on the Artificial Analysis Intelligence Index, 22.9 to 13.0, and GPT-5 Nano costs 6.0x less per output token ($0.40 vs $2.40 per million). Updated October 22, 2026; 53 benchmarks have a result for both.

Replace GPT-5 Nano Replace Nemotron 3 Ultra
GPT-5 NanoOpenAI
Coding
No data
Overall
35.6
Output $/M
$0.40
1
Nemotron 3 UltraNVIDIA
Coding
30.0
Overall
53.1
Output $/M
$2.40
52
vs boards won of 53 shared

GPT-5 Nano or Nemotron 3 Ultra: which to pick

Only Nemotron 3 Ultra has a coding score, 30.0 on the Vibe Coding Index; GPT-5 Nano has none, so the two cannot be ranked on coding.

Pick GPT-5 Nano for output tokens 6.0x cheaper ($0.40 vs $2.40 per million) and a larger context window (400K against 262K tokens).

Model AGPT-5 NanoOpenAINot benchmarkedNo coding benchmark$0.109 per solved taskModel BNemotron 3 UltraNVIDIA30.0/1003 independent benchmarksNo cost per solved task
Shared results
53
GPT-5 Nano only
35
Nemotron 3 Ultra only
18
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 Nano not benchmarked, Nemotron 3 Ultra 30.0 from 3 benchmarks.
Widest category
Agentic work, 46.8 points apart on average over 1 shared benchmark.
Widest single gap
τ²-Bench Telecom: GPT-5 Nano 36.5% against Nemotron 3 Ultra 83.3%, 46.8 points apart on a 0 to 100 scale.
Output price
GPT-5 Nano $0.40 against Nemotron 3 Ultra $2.40 per million output tokens, 6.0x apart.
Context window
GPT-5 Nano 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-5 NanoBarsNemotron 3 UltraTies
Coding05
Intelligence02
Agentic work01
Reasoning08
Math13
Knowledge08
Web design06
General019
All shared boards152
CodingLike-for-likeSix of these boards feed the Vibe Coding Index05
Coding benchmarks for GPT-5 Nano and Nemotron 3 Ultra
BenchmarkGPT-5 NanoNemotron 3 UltraLeader
SWE-bench Verified34.8%Not measuredOnly GPT-5 Nano measured
AA Coding IndexNot measured49.3Only Nemotron 3 Ultra measured
LiveCodeBench (Vals AI)70.2%86.0%Nemotron 3 Ultra
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
LiveCodeBench (Artificial Analysis run)78.9%Not measuredOnly GPT-5 Nano measured
SciCodeNot measured40.3%Only Nemotron 3 Ultra measured
Terminal-Bench Hard (Artificial Analysis run)17.4%36.4%Nemotron 3 Ultra
Terminal-Bench21.8%Not measuredOnly GPT-5 Nano measured
FrontierCodeNot measured13.6%Only Nemotron 3 Ultra measured
WeirdML38.1%43.5%Nemotron 3 Ultra
LMArena Text: coding13511468Nemotron 3 Ultra
LMArena Text: software and IT13451468Nemotron 3 Ultra
Neither model has a result on the other 27 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for GPT-5 Nano and Nemotron 3 Ultra
BenchmarkGPT-5 NanoNemotron 3 UltraLeader
AA Intelligence Index13.022.9Nemotron 3 Ultra
Epoch Capabilities Index139.2146.0Nemotron 3 Ultra
Agentic workLike-for-likePublic boards, shown as published, kept out of the index01
Agentic work benchmarks for GPT-5 Nano and Nemotron 3 Ultra
BenchmarkGPT-5 NanoNemotron 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 Telecom36.5%83.3%Nemotron 3 Ultra
APEX-AgentsNot measured22.7%Only Nemotron 3 Ultra measured
Berkeley Function Calling Leaderboard (BFCL)51.4%Not measuredOnly GPT-5 Nano measured
MCP AtlasNot measured63.1%Only Nemotron 3 Ultra measured
Neither model has a result on the other 34 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index08
Reasoning benchmarks for GPT-5 Nano and Nemotron 3 Ultra
BenchmarkGPT-5 NanoNemotron 3 UltraLeader
GPQA Diamond63.4%86.1%Nemotron 3 Ultra
MMMU Pro (Vals AI)70.9%Not measuredOnly GPT-5 Nano measured
GPQA Diamond (Artificial Analysis run)67.6%86.7%Nemotron 3 Ultra
Humanity's Last Exam (Artificial Analysis run)9.5%28.4%Nemotron 3 Ultra
GPQA Diamond (Epoch AI run)69.4%85.4%Nemotron 3 Ultra
ARC-AGI20.7%Not measuredOnly GPT-5 Nano measured
ARC-AGI-22.6%Not measuredOnly GPT-5 Nano measured
Chess puzzles22.0%Not measuredOnly GPT-5 Nano measured
Mystery game puzzles9.0%20.0%Nemotron 3 Ultra
VPCT37.2%Not measuredOnly GPT-5 Nano measured
LMArena Text: hard prompts13281452Nemotron 3 Ultra
LMArena Text: expert13211472Nemotron 3 Ultra
LMArena Text: hard prompts in English13381453Nemotron 3 Ultra
LMArena Vision: diagrams1141Not measuredOnly GPT-5 Nano measured
LMArena Vision: homework1157Not measuredOnly GPT-5 Nano measured
Kagi LLM Benchmark62.2%Not measuredOnly GPT-5 Nano measured
Neither model has a result on the other 7 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index13
Math benchmarks for GPT-5 Nano and Nemotron 3 Ultra
BenchmarkGPT-5 NanoNemotron 3 UltraLeader
AIME81.2%Not measuredOnly GPT-5 Nano measured
MATH 500 (Vals AI)93.8%Not measuredOnly GPT-5 Nano measured
MGSM (Vals AI)89.3%Not measuredOnly GPT-5 Nano measured
AA Math Index83.7Not measuredOnly GPT-5 Nano measured
AIME 2025 (Artificial Analysis run)83.7%Not measuredOnly GPT-5 Nano measured
OTIS Mock AIME81.1%86.7%Nemotron 3 Ultra
FrontierMath, tiers 1 to 320.0%Not measuredOnly GPT-5 Nano measured
FrontierMath, tier 42.4%Not measuredOnly GPT-5 Nano measured
ProofBench12.0%2.0%GPT-5 Nano
MATH level 595.2%Not measuredOnly GPT-5 Nano measured
LMArena Text: math13171457Nemotron 3 Ultra
LMArena Text: mathematical work13261461Nemotron 3 Ultra
MathArena12.8%Not measuredOnly GPT-5 Nano measured
Neither model has a result on the other 1 board here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index08
Knowledge benchmarks for GPT-5 Nano and Nemotron 3 Ultra
BenchmarkGPT-5 NanoNemotron 3 UltraLeader
MMLU Pro76.1%85.8%Nemotron 3 Ultra
LegalBench (Vals AI)50.1%82.1%Nemotron 3 Ultra
CaseLaw (Vals AI)52.6%Not measuredOnly GPT-5 Nano measured
CorpFin (Vals AI)Not measured65.5%Only Nemotron 3 Ultra measured
TaxEval (Vals AI)67.4%73.1%Nemotron 3 Ultra
MortgageTax (Vals AI)53.6%Not measuredOnly GPT-5 Nano measured
MedQA (Vals AI)93.3%Not measuredOnly GPT-5 Nano measured
MedCode (Vals AI)30.4%38.6%Nemotron 3 Ultra
MMLU Pro (Artificial Analysis run)78.0%Not measuredOnly GPT-5 Nano measured
SimpleQA Verified11.7%Not measuredOnly GPT-5 Nano measured
LMArena Text: science13181465Nemotron 3 Ultra
LMArena Text: medicine and healthcare13351456Nemotron 3 Ultra
LMArena Text: legal and government12981452Nemotron 3 Ultra
LMArena Text: business and finance13111434Nemotron 3 Ultra
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index06
Web design benchmarks for GPT-5 Nano and Nemotron 3 Ultra
BenchmarkGPT-5 NanoNemotron 3 UltraLeader
Design Arena: websites11011145Nemotron 3 Ultra
Design Arena: UI components10641135Nemotron 3 Ultra
Design Arena: game dev10441138Nemotron 3 Ultra
Design Arena: data viz10561141Nemotron 3 Ultra
Design Arena: 3D9651131Nemotron 3 Ultra
Design Arena: all code categories10841146Nemotron 3 Ultra
Design Arena: SVGNot measured1069Only Nemotron 3 Ultra measured
Design Arena: ASCII artNot measured1100Only 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 index019
General benchmarks for GPT-5 Nano and Nemotron 3 Ultra
BenchmarkGPT-5 NanoNemotron 3 UltraLeader
SAGE (Vals AI)30.4%Not measuredOnly GPT-5 Nano measured
MedScribe (Vals AI)72.9%Not measuredOnly GPT-5 Nano measured
IFBench67.6%81.4%Nemotron 3 Ultra
Long context reasoning (AA-LCR)45.0%79.3%Nemotron 3 Ultra
DTBench62.7%90.1%Nemotron 3 Ultra
LMCA7.9%36.9%Nemotron 3 Ultra
Fiction.LiveBench44.4%Not measuredOnly GPT-5 Nano measured
LMArena Text13201445Nemotron 3 Ultra
LMArena Text: instruction following13061418Nemotron 3 Ultra
LMArena Text: creative writing12491399Nemotron 3 Ultra
LMArena Vision1159Not measuredOnly GPT-5 Nano measured
LMArena Text: English13211455Nemotron 3 Ultra
LMArena Text: non-English13131427Nemotron 3 Ultra
LMArena Text: Chinese13561497Nemotron 3 Ultra
LMArena Text: German13271472Nemotron 3 Ultra
LMArena Text: Japanese1227Not measuredOnly GPT-5 Nano measured
LMArena Text: Korean12691384Nemotron 3 Ultra
LMArena Text: FrenchNot measured1472Only Nemotron 3 Ultra measured
LMArena Text: Spanish13601455Nemotron 3 Ultra
LMArena Text: Russian12961417Nemotron 3 Ultra
LMArena Text: Polish13141385Nemotron 3 Ultra
LMArena Text: multi-turn13111411Nemotron 3 Ultra
LMArena Text: longer queries13121437Nemotron 3 Ultra
LMArena Text: writing and language12831406Nemotron 3 Ultra
LMArena Text: entertainment and media12681397Nemotron 3 Ultra
LMArena Vision: English1170Not measuredOnly GPT-5 Nano measured
LMArena Vision: Chinese1176Not measuredOnly GPT-5 Nano measured
LMArena Vision: reading text1152Not measuredOnly GPT-5 Nano measured
LMArena Vision: humor1110Not measuredOnly GPT-5 Nano measured
Neither model has a result on the other 19 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for GPT-5 Nano and Nemotron 3 Ultra
BenchmarkGPT-5 NanoNemotron 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 Nano$0.0003Fits in one request
Nemotron 3 Ultra$0.0018Fits in one request

GPT-5 Nano costs less

Repository review

50K input + 3K output tokens

GPT-5 Nano$0.0037Fits in one request
Nemotron 3 Ultra$0.037Fits in one request

GPT-5 Nano costs less

Agent loop

200K input + 10K output tokens

GPT-5 Nano$0.014Fits in one request
Nemotron 3 Ultra$0.144Fits in one request

GPT-5 Nano 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 Nano and Nemotron 3 Ultra
SpecificationOpenAI GPT-5 NanoNVIDIA Nemotron 3 Ultra
MakerOpenAINVIDIA
WeightsNo public weights listedOpen weights
ReleasedAugust 7, 2025June 4, 2026
Context window400K262K
Input $/Mtok$0.05$0.60
Output $/Mtok$0.40$2.40
Coding indexNot benchmarked30.0
Independent measurements behind it03
Cost per solved task$0.109Not computable
SourceOpenRouter listingOpenRouter listing

Questions

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

Only Nemotron 3 Ultra has a coding score, 30.0 on the Vibe Coding Index; GPT-5 Nano has none, so the two cannot be ranked on coding. Pick GPT-5 Nano for output tokens 6.0x cheaper ($0.40 vs $2.40 per million) and a larger context window (400K against 262K tokens).

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

GPT-5 Nano costs $0.05 per million input tokens and $0.40 per million output tokens; Nemotron 3 Ultra costs $0.60 and $2.40. Cost per solved task is known for GPT-5 Nano only.

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

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

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

53 benchmarks have a result for both models as of October 22, 2026. GPT-5 Nano's coding index rests on 0 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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