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Claude Opus 4.6 vs Nemotron 3 Ultra

Claude Opus 4.6 leads Nemotron 3 Ultra on coding, 57.2 to 30.0 on the Vibe Coding Index, and Nemotron 3 Ultra costs 10.4x less per output token ($2.40 vs $25.00 per million). Updated October 22, 2026; 62 benchmarks have a result for both.

Replace Claude Opus 4.6 Replace Nemotron 3 Ultra
Claude Opus 4.6Anthropic
Coding
57.2
Overall
66.0
Output $/M
$25.00
59
Nemotron 3 UltraNVIDIA
Coding
30.0
Overall
53.1
Output $/M
$2.40
3
vs boards won of 62 shared

Claude Opus 4.6 or Nemotron 3 Ultra: which to pick

Pick Claude Opus 4.6 for coding: it scores 57.2 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra.

Pick Nemotron 3 Ultra for output tokens 10.4x cheaper ($2.40 vs $25.00 per million) and work measured by LiveCodeBench (Vals AI) or IFBench, where it leads.

Model AClaude Opus 4.6Anthropic57.2/1004 independent benchmarks$1.56 per solved taskModel BNemotron 3 UltraNVIDIA30.0/1003 independent benchmarksNo cost per solved task
Shared results
62
Claude Opus 4.6 only
57
Nemotron 3 Ultra only
9
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 Opus 4.6 57.2 from 4 benchmarks, Nemotron 3 Ultra 30.0 from 3 benchmarks.
Widest category
Math, 19.1 points apart on average over 4 shared benchmarks.
Widest single gap
Vibe Code Bench (Vals AI): Claude Opus 4.6 57.6% against Nemotron 3 Ultra 7.6%, 49.9 points apart on a 0 to 100 scale.
Output price
Claude Opus 4.6 $25.00 against Nemotron 3 Ultra $2.40 per million output tokens, 10.4x apart.
Context window
Claude Opus 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 Opus 4.6BarsNemotron 3 UltraTies
Coding71
Intelligence20
Agentic work30
Reasoning80
Math40
Knowledge90
Web design80
General182
All shared boards593
CodingLike-for-likeSix of these boards feed the Vibe Coding Index71
Coding benchmarks for Claude Opus 4.6 and Nemotron 3 Ultra
BenchmarkClaude Opus 4.6Nemotron 3 UltraLeader
SWE-bench Verified75.6%Not measuredOnly Claude Opus 4.6 measured
SWE-bench Multilingual72.0%Not measuredOnly Claude Opus 4.6 measured
LMArena WebDev1547Not measuredOnly Claude Opus 4.6 measured
AA Coding IndexNot measured49.3Only Nemotron 3 Ultra measured
LiveCodeBench (Vals AI)84.7%86.0%Nemotron 3 Ultra
SWE-bench Verified (Vals AI)78.2%69.0%Claude Opus 4.6
Vibe Code Bench (Vals AI)57.6%7.6%Claude Opus 4.6
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)48.5%36.4%Claude Opus 4.6
Terminal-Bench79.8%Not measuredOnly Claude Opus 4.6 measured
FrontierCode26.6%13.6%Claude Opus 4.6
GSO-Bench41.2%Not measuredOnly Claude Opus 4.6 measured
WeirdML78.0%43.5%Claude Opus 4.6
Cybench93.0%Not measuredOnly Claude Opus 4.6 measured
LMArena Text: coding15341468Claude Opus 4.6
LMArena Text: software and IT15271468Claude Opus 4.6
LMArena WebDev: React1539Not measuredOnly Claude Opus 4.6 measured
LMArena WebDev: HTML1559Not measuredOnly Claude Opus 4.6 measured
LMArena WebDev: from an image1543Not measuredOnly Claude Opus 4.6 measured
SWE Atlas: Codebase QnA33.3%Not measuredOnly Claude Opus 4.6 measured
SWE Atlas: Refactoring35.6%Not measuredOnly Claude Opus 4.6 measured
SWE Atlas: Test Writing36.7%Not measuredOnly Claude Opus 4.6 measured
Neither model has a result on the other 18 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Claude Opus 4.6 and Nemotron 3 Ultra
BenchmarkClaude Opus 4.6Nemotron 3 UltraLeader
AA Intelligence Index31.922.9Claude Opus 4.6
Epoch Capabilities Index155.7146.0Claude Opus 4.6
Agentic workLike-for-likePublic boards, shown as published, kept out of the index30
Agentic work benchmarks for Claude Opus 4.6 and Nemotron 3 Ultra
BenchmarkClaude Opus 4.6Nemotron 3 UltraLeader
AA Agentic IndexNot measured20.1Only Nemotron 3 Ultra measured
Design Arena: agents building web apps1206Not measuredOnly Claude Opus 4.6 measured
Design Arena: agents building full-stack apps1220Not measuredOnly Claude Opus 4.6 measured
Design Arena: agents building mobile apps1207Not measuredOnly Claude Opus 4.6 measured
Design Arena: agents building Android apps1197Not measuredOnly Claude Opus 4.6 measured
Design Arena: agents building games1213Not measuredOnly Claude Opus 4.6 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 Telecom92.1%83.3%Claude Opus 4.6
APEX-Agents46.3%22.7%Claude Opus 4.6
METR time horizons78.9%Not measuredOnly Claude Opus 4.6 measured
Remote Labor Index4.2%Not measuredOnly Claude Opus 4.6 measured
DeepResearch Bench55.3%Not measuredOnly Claude Opus 4.6 measured
Vending-Bench 2$8,018Not measuredOnly Claude Opus 4.6 measured
MCP Atlas76.8%63.1%Claude Opus 4.6
Neither model has a result on the other 26 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index80
Reasoning benchmarks for Claude Opus 4.6 and Nemotron 3 Ultra
BenchmarkClaude Opus 4.6Nemotron 3 UltraLeader
GPQA Diamond89.7%86.1%Claude Opus 4.6
MMMU Pro (Vals AI)83.9%Not measuredOnly Claude Opus 4.6 measured
GPQA Diamond (Artificial Analysis run)89.6%86.7%Claude Opus 4.6
Humanity's Last Exam (Artificial Analysis run)39.9%28.4%Claude Opus 4.6
GPQA Diamond (Epoch AI run)90.5%85.4%Claude Opus 4.6
ARC-AGI94.0%Not measuredOnly Claude Opus 4.6 measured
ARC-AGI-269.2%Not measuredOnly Claude Opus 4.6 measured
SimpleBench67.6%Not measuredOnly Claude Opus 4.6 measured
Chess puzzles21.0%Not measuredOnly Claude Opus 4.6 measured
Mystery game puzzles25.0%20.0%Claude Opus 4.6
EBR-bench12.7%Not measuredOnly Claude Opus 4.6 measured
LMArena Text: hard prompts15251452Claude Opus 4.6
LMArena Text: expert15441472Claude Opus 4.6
LMArena Text: hard prompts in English15301453Claude Opus 4.6
LMArena Vision: diagrams1340Not measuredOnly Claude Opus 4.6 measured
LMArena Vision: homework1337Not measuredOnly Claude Opus 4.6 measured
Kagi LLM Benchmark83.6%Not measuredOnly Claude Opus 4.6 measured
Neither model has a result on the other 6 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index40
Math benchmarks for Claude Opus 4.6 and Nemotron 3 Ultra
BenchmarkClaude Opus 4.6Nemotron 3 UltraLeader
AIME95.6%Not measuredOnly Claude Opus 4.6 measured
OTIS Mock AIME94.4%86.7%Claude Opus 4.6
FrontierMath, tiers 1 to 366.0%Not measuredOnly Claude Opus 4.6 measured
FrontierMath, tier 426.8%Not measuredOnly Claude Opus 4.6 measured
ProofBench50.0%2.0%Claude Opus 4.6
LMArena Text: math15181457Claude Opus 4.6
LMArena Text: mathematical work15251461Claude Opus 4.6
MathArena23.6%Not measuredOnly Claude Opus 4.6 measured
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index90
Knowledge benchmarks for Claude Opus 4.6 and Nemotron 3 Ultra
BenchmarkClaude Opus 4.6Nemotron 3 UltraLeader
MMLU Pro89.1%85.8%Claude Opus 4.6
LegalBench (Vals AI)85.3%82.1%Claude Opus 4.6
CaseLaw (Vals AI)62.1%Not measuredOnly Claude Opus 4.6 measured
CorpFin (Vals AI)67.0%65.5%Claude Opus 4.6
TaxEval (Vals AI)76.0%73.1%Claude Opus 4.6
MortgageTax (Vals AI)68.5%Not measuredOnly Claude Opus 4.6 measured
MedQA (Vals AI)95.4%Not measuredOnly Claude Opus 4.6 measured
MedCode (Vals AI)49.1%38.6%Claude Opus 4.6
SimpleQA Verified47.0%Not measuredOnly Claude Opus 4.6 measured
LMArena Text: science15191465Claude Opus 4.6
LMArena Text: medicine and healthcare15041456Claude Opus 4.6
LMArena Text: legal and government15121452Claude Opus 4.6
LMArena Text: business and finance14971434Claude Opus 4.6
FACTS Benchmark Suite41.5%Not measuredOnly Claude Opus 4.6 measured
PRBench Finance53.3%Not measuredOnly Claude Opus 4.6 measured
PRBench Legal52.3%Not measuredOnly Claude Opus 4.6 measured
Neither model has a result on the other 4 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index80
Web design benchmarks for Claude Opus 4.6 and Nemotron 3 Ultra
BenchmarkClaude Opus 4.6Nemotron 3 UltraLeader
Design Arena: websites12911145Claude Opus 4.6
Design Arena: UI components12821135Claude Opus 4.6
Design Arena: game dev12771138Claude Opus 4.6
Design Arena: data viz12801141Claude Opus 4.6
Design Arena: 3D12731131Claude Opus 4.6
Design Arena: all code categories12881146Claude Opus 4.6
Design Arena: SVG12271069Claude Opus 4.6
Design Arena: ASCII art12551100Claude Opus 4.6
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index182
General benchmarks for Claude Opus 4.6 and Nemotron 3 Ultra
BenchmarkClaude Opus 4.6Nemotron 3 UltraLeader
SAGE (Vals AI)51.6%Not measuredOnly Claude Opus 4.6 measured
MedScribe (Vals AI)86.7%Not measuredOnly Claude Opus 4.6 measured
IFBench53.1%81.4%Nemotron 3 Ultra
Long context reasoning (AA-LCR)78.0%79.3%Nemotron 3 Ultra
DTBench91.2%90.1%Claude Opus 4.6
LMCA55.8%36.9%Claude Opus 4.6
CL-bench20.7%Not measuredOnly Claude Opus 4.6 measured
Furniture assembly28.3%Not measuredOnly Claude Opus 4.6 measured
CL-bench Life17.0%Not measuredOnly Claude Opus 4.6 measured
LMArena Text15011445Claude Opus 4.6
LMArena Text: instruction following15211418Claude Opus 4.6
LMArena Text: creative writing15051399Claude Opus 4.6
LMArena Vision1316Not measuredOnly Claude Opus 4.6 measured
LMArena Text: English15111455Claude Opus 4.6
LMArena Text: non-English14881427Claude Opus 4.6
LMArena Text: Chinese15511497Claude Opus 4.6
LMArena Text: German15001472Claude Opus 4.6
LMArena Text: Japanese1488Not measuredOnly Claude Opus 4.6 measured
LMArena Text: Korean14641384Claude Opus 4.6
LMArena Text: French15121472Claude Opus 4.6
LMArena Text: Spanish15101455Claude Opus 4.6
LMArena Text: Russian14971417Claude Opus 4.6
LMArena Text: Polish14991385Claude Opus 4.6
LMArena Text: multi-turn15111411Claude Opus 4.6
LMArena Text: longer queries15181437Claude Opus 4.6
LMArena Text: writing and language15021406Claude Opus 4.6
LMArena Text: entertainment and media14921397Claude Opus 4.6
LMArena Vision: English1324Not measuredOnly Claude Opus 4.6 measured
LMArena Vision: Chinese1370Not measuredOnly Claude Opus 4.6 measured
LMArena Vision: reading text1326Not measuredOnly Claude Opus 4.6 measured
LMArena Vision: humor1314Not measuredOnly Claude Opus 4.6 measured
LMArena Vision: recognizing things1274Not measuredOnly Claude Opus 4.6 measured
LMArena Vision: creative writing1331Not measuredOnly Claude Opus 4.6 measured
LMArena Document1507Not measuredOnly Claude Opus 4.6 measured
MultiChallenge56.0%Not measuredOnly Claude Opus 4.6 measured
EQ-Bench 41223Not measuredOnly Claude Opus 4.6 measured
Neither model has a result on the other 12 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Claude Opus 4.6 and Nemotron 3 Ultra
BenchmarkClaude Opus 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 Opus 4.6$0.018Fits in one request
Nemotron 3 Ultra$0.0018Fits in one request

Nemotron 3 Ultra costs less

Repository review

50K input + 3K output tokens

Claude Opus 4.6$0.325Fits in one request
Nemotron 3 Ultra$0.037Fits in one request

Nemotron 3 Ultra costs less

Agent loop

200K input + 10K output tokens

Claude Opus 4.6$1.25Fits 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 Opus 4.6 and Nemotron 3 Ultra
SpecificationAnthropic Claude Opus 4.6NVIDIA Nemotron 3 Ultra
MakerAnthropicNVIDIA
WeightsNo public weights listedOpen weights
ReleasedFebruary 4, 2026June 4, 2026
Context window1M262K
Input $/Mtok$5.00$0.60
Output $/Mtok$25.00$2.40
Coding index57.230.0
Independent measurements behind it43
Cost per solved task$1.56Not computable
SourceOpenRouter listingOpenRouter listing

Questions

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

Pick Claude Opus 4.6 for coding: it scores 57.2 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra. Pick Nemotron 3 Ultra for output tokens 10.4x cheaper ($2.40 vs $25.00 per million) and work measured by LiveCodeBench (Vals AI) or IFBench, where it leads.

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

Claude Opus 4.6 costs $5.00 per million input tokens and $25.00 per million output tokens; Nemotron 3 Ultra costs $0.60 and $2.40. Cost per solved task is known for Claude Opus 4.6 only.

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

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

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

62 benchmarks have a result for both models as of October 22, 2026. Claude Opus 4.6's coding index rests on 4 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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