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Claude Sonnet 4.6 vs Nemotron 3 Ultra

Claude Sonnet 4.6 leads Nemotron 3 Ultra on coding, 57.3 to 30.0 on the Vibe Coding Index, and Nemotron 3 Ultra costs 6.3x less per output token ($2.40 vs $15.00 per million). Updated October 23, 2026; 70 benchmarks have a result for both.

Replace Claude Sonnet 4.6 Replace Nemotron 3 Ultra
Claude Sonnet 4.6Anthropic
Coding
57.3
Overall
60.3
Output $/M
$15.00
58
Nemotron 3 UltraNVIDIA
Coding
30.0
Overall
53.1
Output $/M
$2.40
12
vs boards won of 70 shared

Claude Sonnet 4.6 or Nemotron 3 Ultra: which to pick

Pick Claude Sonnet 4.6 for coding: it scores 57.3 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra.

Pick Nemotron 3 Ultra for output tokens 6.3x cheaper ($2.40 vs $15.00 per million) and work measured by LiveCodeBench (Vals AI) or τ²-Bench Telecom, where it leads.

Model AClaude Sonnet 4.6Anthropic57.3/1005 independent benchmarks$1.68 per solved taskModel BNemotron 3 UltraNVIDIA30.0/1003 independent benchmarksNo cost per solved task
Shared results
70
Claude Sonnet 4.6 only
53
Nemotron 3 Ultra only
1
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
Claude Sonnet 4.6 57.3 from 5 benchmarks, Nemotron 3 Ultra 30.0 from 3 benchmarks.
Widest category
Web design, 16.0 points apart on average over 8 shared benchmarks.
Widest single gap
Vibe Code Bench (Vals AI): Claude Sonnet 4.6 55.8% against Nemotron 3 Ultra 7.6%, 48.1 points apart on a 0 to 100 scale.
Output price
Claude Sonnet 4.6 $15.00 against Nemotron 3 Ultra $2.40 per million output tokens, 6.3x apart.
Context window
Claude Sonnet 4.6 takes 1M 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
CategoryClaude Sonnet 4.6BarsNemotron 3 UltraTies
Coding121
Intelligence20
Agentic work61
Reasoning62
Math31
Knowledge62
Web design80
General155
All shared boards5812
CodingLike-for-likeSix of these boards feed the Vibe Coding Index121
Coding benchmarks for Claude Sonnet 4.6 and Nemotron 3 Ultra
BenchmarkClaude Sonnet 4.6Nemotron 3 UltraLeader
LiveBench coding66.6%Not measuredOnly Claude Sonnet 4.6 measured
LMArena WebDev1523Not measuredOnly Claude Sonnet 4.6 measured
AA Coding Index63.049.3Claude Sonnet 4.6
LiveCodeBench (Vals AI)82.1%86.0%Nemotron 3 Ultra
SWE-bench Verified (Vals AI)77.4%69.0%Claude Sonnet 4.6
Vibe Code Bench (Vals AI)55.8%7.6%Claude Sonnet 4.6
Code migration (Vals AI)39.9%4.9%Claude Sonnet 4.6
ProgramBench (Vals AI)0.5%0.0%Claude Sonnet 4.6
Terminal-Bench 2.1 (Vals AI)57.3%50.9%Claude Sonnet 4.6
SkillsBench (Vals AI)49.0%Not measuredOnly Claude Sonnet 4.6 measured
SciCode50.1%40.3%Claude Sonnet 4.6
Terminal-Bench Hard (Artificial Analysis run)53.0%36.4%Claude Sonnet 4.6
Terminal-Bench53.4%Not measuredOnly Claude Sonnet 4.6 measured
FrontierCode24.3%13.6%Claude Sonnet 4.6
WeirdML66.1%43.5%Claude Sonnet 4.6
LMArena Text: coding15031467Claude Sonnet 4.6
LMArena Text: software and IT14911468Claude Sonnet 4.6
LMArena WebDev: React1512Not measuredOnly Claude Sonnet 4.6 measured
LMArena WebDev: HTML1527Not measuredOnly Claude Sonnet 4.6 measured
LMArena WebDev: from an image1529Not measuredOnly Claude Sonnet 4.6 measured
SWE Atlas: Codebase QnA31.2%Not measuredOnly Claude Sonnet 4.6 measured
SWE Atlas: Refactoring32.2%Not measuredOnly Claude Sonnet 4.6 measured
SWE Atlas: Test Writing31.8%Not measuredOnly Claude Sonnet 4.6 measured
Neither model has a result on the other 20 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Claude Sonnet 4.6 and Nemotron 3 Ultra
BenchmarkClaude Sonnet 4.6Nemotron 3 UltraLeader
AA Intelligence Index30.122.9Claude Sonnet 4.6
Epoch Capabilities Index152.8146.0Claude Sonnet 4.6
Agentic workLike-for-likePublic boards, shown as published, kept out of the index61
Agentic work benchmarks for Claude Sonnet 4.6 and Nemotron 3 Ultra
BenchmarkClaude Sonnet 4.6Nemotron 3 UltraLeader
AA Agentic Index31.820.1Claude Sonnet 4.6
Design Arena: agents building web apps1190Not measuredOnly Claude Sonnet 4.6 measured
Design Arena: agents building full-stack apps1213Not measuredOnly Claude Sonnet 4.6 measured
Design Arena: agents building mobile apps1212Not measuredOnly Claude Sonnet 4.6 measured
Design Arena: agents building Android apps1198Not measuredOnly Claude Sonnet 4.6 measured
Design Arena: agents building Godot games1226Not measuredOnly Claude Sonnet 4.6 measured
Design Arena: agents building games1177Not measuredOnly Claude Sonnet 4.6 measured
LiveBench research63.6%Not measuredOnly Claude Sonnet 4.6 measured
LiveBench browser68.0%Not measuredOnly Claude Sonnet 4.6 measured
LiveBench long agentic23.1%Not measuredOnly Claude Sonnet 4.6 measured
Finance Agent (Vals AI)51.0%37.7%Claude Sonnet 4.6
Tax Agent Bench (Vals AI)25.8%Not measuredOnly Claude Sonnet 4.6 measured
Legal Research Bench (Vals AI)38.5%15.4%Claude Sonnet 4.6
Excel Modeling Benchmark (Vals AI)60.2%31.7%Claude Sonnet 4.6
τ²-Bench Telecom79.5%83.3%Nemotron 3 Ultra
APEX-Agents43.0%22.7%Claude Sonnet 4.6
OSWorld 2.09.3%Not measuredOnly Claude Sonnet 4.6 measured
DeepResearch Bench54.9%Not measuredOnly Claude Sonnet 4.6 measured
OSWorld72.1%Not measuredOnly Claude Sonnet 4.6 measured
Vending-Bench 2$7,204Not measuredOnly Claude Sonnet 4.6 measured
MCP Atlas69.5%63.1%Claude Sonnet 4.6
Neither model has a result on the other 21 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index62
Reasoning benchmarks for Claude Sonnet 4.6 and Nemotron 3 Ultra
BenchmarkClaude Sonnet 4.6Nemotron 3 UltraLeader
GPQA Diamond85.6%86.1%Nemotron 3 Ultra
LiveBench reasoning86.4%Not measuredOnly Claude Sonnet 4.6 measured
MMMU Pro (Vals AI)83.6%Not measuredOnly Claude Sonnet 4.6 measured
GPQA Diamond (Artificial Analysis run)87.5%86.7%Claude Sonnet 4.6
Humanity's Last Exam (Artificial Analysis run)33.6%28.4%Claude Sonnet 4.6
GPQA Diamond (Epoch AI run)87.4%85.4%Claude Sonnet 4.6
ARC-AGI86.5%Not measuredOnly Claude Sonnet 4.6 measured
ARC-AGI-260.4%Not measuredOnly Claude Sonnet 4.6 measured
Chess puzzles23.0%Not measuredOnly Claude Sonnet 4.6 measured
Mystery game puzzles16.0%20.0%Nemotron 3 Ultra
LMArena Text: hard prompts14851452Claude Sonnet 4.6
LMArena Text: expert15001472Claude Sonnet 4.6
LMArena Text: hard prompts in English14931453Claude Sonnet 4.6
LMArena Vision: diagrams1306Not measuredOnly Claude Sonnet 4.6 measured
LMArena Vision: homework1311Not measuredOnly Claude Sonnet 4.6 measured
Neither model has a result on the other 8 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index31
Math benchmarks for Claude Sonnet 4.6 and Nemotron 3 Ultra
BenchmarkClaude Sonnet 4.6Nemotron 3 UltraLeader
AIME92.3%Not measuredOnly Claude Sonnet 4.6 measured
OTIS Mock AIME85.8%86.7%Nemotron 3 Ultra
ProofBench45.0%2.0%Claude Sonnet 4.6
LMArena Text: math14621457Claude Sonnet 4.6
LMArena Text: mathematical work14831462Claude Sonnet 4.6
Neither model has a result on the other 9 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index62
Knowledge benchmarks for Claude Sonnet 4.6 and Nemotron 3 Ultra
BenchmarkClaude Sonnet 4.6Nemotron 3 UltraLeader
MMLU Pro87.3%85.8%Claude Sonnet 4.6
LegalBench (Vals AI)82.1%82.1%Claude Sonnet 4.6
CaseLaw (Vals AI)64.0%Not measuredOnly Claude Sonnet 4.6 measured
CorpFin (Vals AI)65.3%65.5%Nemotron 3 Ultra
TaxEval (Vals AI)77.1%73.1%Claude Sonnet 4.6
MortgageTax (Vals AI)67.7%Not measuredOnly Claude Sonnet 4.6 measured
MedQA (Vals AI)92.1%Not measuredOnly Claude Sonnet 4.6 measured
MedCode (Vals AI)Not measured38.6%Only Nemotron 3 Ultra measured
SimpleQA Verified35.5%Not measuredOnly Claude Sonnet 4.6 measured
LMArena Text: science14751465Claude Sonnet 4.6
LMArena Text: medicine and healthcare14511455Nemotron 3 Ultra
LMArena Text: legal and government14701453Claude Sonnet 4.6
LMArena Text: business and finance14641435Claude Sonnet 4.6
FACTS Benchmark Suite37.0%Not measuredOnly Claude Sonnet 4.6 measured
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index80
Web design benchmarks for Claude Sonnet 4.6 and Nemotron 3 Ultra
BenchmarkClaude Sonnet 4.6Nemotron 3 UltraLeader
Design Arena: websites12851145Claude Sonnet 4.6
Design Arena: UI components12691135Claude Sonnet 4.6
Design Arena: game dev12581138Claude Sonnet 4.6
Design Arena: data viz12781142Claude Sonnet 4.6
Design Arena: 3D12351132Claude Sonnet 4.6
Design Arena: all code categories12751146Claude Sonnet 4.6
Design Arena: SVG11961069Claude Sonnet 4.6
Design Arena: ASCII art12351100Claude Sonnet 4.6
LiveBench design71.8%Not measuredOnly Claude Sonnet 4.6 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index155
General benchmarks for Claude Sonnet 4.6 and Nemotron 3 Ultra
BenchmarkClaude Sonnet 4.6Nemotron 3 UltraLeader
LiveBench data analysis76.1%Not measuredOnly Claude Sonnet 4.6 measured
Public Benefits Bench (Vals AI)62.5%Not measuredOnly Claude Sonnet 4.6 measured
SAGE (Vals AI)46.6%Not measuredOnly Claude Sonnet 4.6 measured
Vals Multimodal Index60.6%Not measuredOnly Claude Sonnet 4.6 measured
IFBench56.6%81.4%Nemotron 3 Ultra
Long context reasoning (AA-LCR)80.0%79.3%Claude Sonnet 4.6
DTBench89.9%90.1%Nemotron 3 Ultra
LMCA46.5%36.9%Claude Sonnet 4.6
ExploitBench23.6%Not measuredOnly Claude Sonnet 4.6 measured
LMArena Text14581445Claude Sonnet 4.6
LMArena Text: instruction following14761418Claude Sonnet 4.6
LMArena Text: creative writing14351398Claude Sonnet 4.6
LMArena Vision1283Not measuredOnly Claude Sonnet 4.6 measured
LMArena Text: English14721454Claude Sonnet 4.6
LMArena Text: non-English14401427Claude Sonnet 4.6
LMArena Text: Chinese14911498Nemotron 3 Ultra
LMArena Text: German14281474Nemotron 3 Ultra
LMArena Text: Japanese1420Not measuredOnly Claude Sonnet 4.6 measured
LMArena Text: Korean14101385Claude Sonnet 4.6
LMArena Text: French14651473Nemotron 3 Ultra
LMArena Text: Spanish14641454Claude Sonnet 4.6
LMArena Text: Russian14401417Claude Sonnet 4.6
LMArena Text: Polish14421385Claude Sonnet 4.6
LMArena Text: multi-turn14641411Claude Sonnet 4.6
LMArena Text: longer queries14791437Claude Sonnet 4.6
LMArena Text: writing and language14441405Claude Sonnet 4.6
LMArena Text: entertainment and media14311397Claude Sonnet 4.6
LMArena Vision: English1298Not measuredOnly Claude Sonnet 4.6 measured
LMArena Vision: Chinese1307Not measuredOnly Claude Sonnet 4.6 measured
LMArena Vision: reading text1296Not measuredOnly Claude Sonnet 4.6 measured
LMArena Vision: humor1248Not measuredOnly Claude Sonnet 4.6 measured
LMArena Vision: recognizing things1195Not measuredOnly Claude Sonnet 4.6 measured
LMArena Vision: creative writing1272Not measuredOnly Claude Sonnet 4.6 measured
LMArena Document1482Not measuredOnly Claude Sonnet 4.6 measured
EQ-Bench 41207Not measuredOnly Claude Sonnet 4.6 measured
Neither model has a result on the other 13 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Claude Sonnet 4.6 and Nemotron 3 Ultra
BenchmarkClaude Sonnet 4.6Nemotron 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

Claude Sonnet 4.6$0.011Fits in one request
Nemotron 3 Ultra$0.0018Fits in one request

Nemotron 3 Ultra costs less

Repository review

50K input + 3K output tokens

Claude Sonnet 4.6$0.195Fits in one request
Nemotron 3 Ultra$0.037Fits in one request

Nemotron 3 Ultra costs less

Agent loop

200K input + 10K output tokens

Claude Sonnet 4.6$0.750Fits 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 Claude Sonnet 4.6 and Nemotron 3 Ultra
SpecificationAnthropic Claude Sonnet 4.6NVIDIA Nemotron 3 Ultra
MakerAnthropicNVIDIA
WeightsNo public weights listedOpen weights
ReleasedFebruary 17, 2026June 4, 2026
Context window1M262K
Input $/Mtok$3.00$0.60
Output $/Mtok$15.00$2.40
Coding index57.330.0
Independent measurements behind it53
Cost per solved task$1.68Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Sonnet 4.6 better than Nemotron 3 Ultra for coding?

Pick Claude Sonnet 4.6 for coding: it scores 57.3 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra. Pick Nemotron 3 Ultra for output tokens 6.3x cheaper ($2.40 vs $15.00 per million) and work measured by LiveCodeBench (Vals AI) or τ²-Bench Telecom, where it leads.

Which is cheaper, Claude Sonnet 4.6 or Nemotron 3 Ultra?

Claude Sonnet 4.6 costs $3.00 per million input tokens and $15.00 per million output tokens; Nemotron 3 Ultra costs $0.60 and $2.40. Cost per solved task is known for Claude Sonnet 4.6 only.

Which has the bigger context window, Claude Sonnet 4.6 or Nemotron 3 Ultra?

Claude Sonnet 4.6, with 1M tokens against 262K.

How many benchmarks is the Claude Sonnet 4.6 vs Nemotron 3 Ultra comparison based on?

70 benchmarks have a result for both models as of October 23, 2026. Claude Sonnet 4.6's coding index rests on 5 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/claude-sonnet-4-6-vs-nvidia-nemotron-3-ultra-550b-a55b">LLMBenchmark.ai, Claude Sonnet 4.6 vs Nemotron 3 Ultra</a></p>