Enter opens the highlighted result. Esc closes.

Kimi K2.6 vs Nemotron 3 Ultra

Kimi K2.6 leads Nemotron 3 Ultra on coding, 52.1 to 30.0 on the Vibe Coding Index, and Nemotron 3 Ultra costs 1.7x less per output token ($2.40 vs $4.00 per million). Updated October 22, 2026; 68 benchmarks have a result for both.

Replace Kimi K2.6 Replace Nemotron 3 Ultra
Kimi K2.6Moonshot AI
Coding
52.1
Overall
60.5
Output $/M
$4.00
63
Nemotron 3 UltraNVIDIA
Coding
30.0
Overall
53.1
Output $/M
$2.40
4
vs boards won of 68 shared, 1 tied

Kimi K2.6 or Nemotron 3 Ultra: which to pick

Pick Kimi K2.6 for coding: it scores 52.1 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra.

Pick Nemotron 3 Ultra for output tokens 1.7x cheaper ($2.40 vs $4.00 per million) and work measured by Mystery game puzzles or IFBench, where it leads.

Model AKimi K2.6Moonshot AI52.1/1003 independent benchmarks$0.35 per solved taskModel BNemotron 3 UltraNVIDIA30.0/1003 independent benchmarksNo cost per solved task
Shared results
68
Kimi K2.6 only
43
Nemotron 3 Ultra only
3
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
Kimi K2.6 52.1 from 3 benchmarks, Nemotron 3 Ultra 30.0 from 3 benchmarks.
Widest category
Web design, 14.2 points apart on average over 8 shared benchmarks.
Widest single gap
Vibe Code Bench (Vals AI): Kimi K2.6 37.9% against Nemotron 3 Ultra 7.6%, 30.3 points apart on a 0 to 100 scale.
Output price
Kimi K2.6 $4.00 against Nemotron 3 Ultra $2.40 per million output tokens, 1.7x apart.
Context window
Both take 262K tokens.

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
CategoryKimi K2.6BarsNemotron 3 UltraTies
Coding1101 tie
Intelligence20
Agentic work50
Reasoning71
Math40
Knowledge90
Web design80
General173
All shared boards6341 tie
CodingLike-for-likeSix of these boards feed the Vibe Coding Index110
Coding benchmarks for Kimi K2.6 and Nemotron 3 Ultra
BenchmarkKimi K2.6Nemotron 3 UltraLeader
LMArena WebDev1509Not measuredOnly Kimi K2.6 measured
AA Coding Index61.849.3Kimi K2.6
LiveCodeBench (Vals AI)86.8%86.0%Kimi K2.6
SWE-bench Verified (Vals AI)76.2%69.0%Kimi K2.6
Vibe Code Bench (Vals AI)37.9%7.6%Kimi K2.6
Code migration (Vals AI)27.8%4.9%Kimi K2.6
ProgramBench (Vals AI)0.0%0.0%Tie
Terminal-Bench 2.1 (Vals AI)53.6%50.9%Kimi K2.6
SciCode51.5%40.3%Kimi K2.6
Terminal-Bench Hard (Artificial Analysis run)43.9%36.4%Kimi K2.6
FrontierCodeNot measured13.6%Only Nemotron 3 Ultra measured
WeirdML55.9%43.5%Kimi K2.6
ALE-Bench1092.7Not measuredOnly Kimi K2.6 measured
LMArena Text: coding14891468Kimi K2.6
LMArena Text: software and IT14841468Kimi K2.6
LMArena WebDev: React1505Not measuredOnly Kimi K2.6 measured
LMArena WebDev: HTML1485Not measuredOnly Kimi K2.6 measured
LMArena WebDev: from an image1521Not measuredOnly Kimi K2.6 measured
Neither model has a result on the other 25 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Kimi K2.6 and Nemotron 3 Ultra
BenchmarkKimi K2.6Nemotron 3 UltraLeader
AA Intelligence Index27.022.9Kimi K2.6
Epoch Capabilities Index150.9146.0Kimi K2.6
Agentic workLike-for-likePublic boards, shown as published, kept out of the index50
Agentic work benchmarks for Kimi K2.6 and Nemotron 3 Ultra
BenchmarkKimi K2.6Nemotron 3 UltraLeader
AA Agentic Index20.520.1Kimi K2.6
Design Arena: agents building web apps1268Not measuredOnly Kimi K2.6 measured
Design Arena: agents building full-stack apps1155Not measuredOnly Kimi K2.6 measured
Design Arena: agents building mobile apps1156Not measuredOnly Kimi K2.6 measured
Design Arena: agents building Android apps1160Not measuredOnly Kimi K2.6 measured
Design Arena: agents building Godot games1120Not measuredOnly Kimi K2.6 measured
Design Arena: agents building games1141Not measuredOnly Kimi K2.6 measured
Design Arena: HTML slides1124Not measuredOnly Kimi K2.6 measured
Design Arena: PowerPoint slides1102Not measuredOnly Kimi K2.6 measured
Design Arena: spreadsheets1276Not measuredOnly Kimi K2.6 measured
Finance Agent (Vals AI)44.9%37.7%Kimi K2.6
Tax Agent Bench (Vals AI)12.4%Not measuredOnly Kimi K2.6 measured
Legal Research Bench (Vals AI)15.9%15.4%Kimi K2.6
Excel Modeling Benchmark (Vals AI)57.9%31.7%Kimi K2.6
τ²-Bench Telecom95.9%83.3%Kimi K2.6
APEX-AgentsNot measured22.7%Only Nemotron 3 Ultra measured
OSWorld 2.04.6%Not measuredOnly Kimi K2.6 measured
Vending-Bench 2$6,205Not measuredOnly Kimi K2.6 measured
MCP AtlasNot measured63.1%Only Nemotron 3 Ultra measured
Neither model has a result on the other 23 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index71
Reasoning benchmarks for Kimi K2.6 and Nemotron 3 Ultra
BenchmarkKimi K2.6Nemotron 3 UltraLeader
GPQA Diamond89.1%86.1%Kimi K2.6
MMMU Pro (Vals AI)86.3%Not measuredOnly Kimi K2.6 measured
GPQA Diamond (Artificial Analysis run)91.1%86.7%Kimi K2.6
Humanity's Last Exam (Artificial Analysis run)37.5%28.4%Kimi K2.6
GPQA Diamond (Epoch AI run)90.8%85.4%Kimi K2.6
Chess puzzles20.0%Not measuredOnly Kimi K2.6 measured
Mystery game puzzles18.0%20.0%Nemotron 3 Ultra
EBR-bench2.4%Not measuredOnly Kimi K2.6 measured
LMArena Text: hard prompts14701452Kimi K2.6
LMArena Text: expert14911472Kimi K2.6
LMArena Text: hard prompts in English14711453Kimi K2.6
LMArena Vision: diagrams1298Not measuredOnly Kimi K2.6 measured
LMArena Vision: homework1310Not measuredOnly Kimi K2.6 measured
Neither model has a result on the other 10 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index40
Math benchmarks for Kimi K2.6 and Nemotron 3 Ultra
BenchmarkKimi K2.6Nemotron 3 UltraLeader
OTIS Mock AIME96.1%86.7%Kimi K2.6
FrontierMath, tiers 1 to 357.2%Not measuredOnly Kimi K2.6 measured
FrontierMath, tier 425.6%Not measuredOnly Kimi K2.6 measured
ProofBench16.0%2.0%Kimi K2.6
LMArena Text: math14741457Kimi K2.6
LMArena Text: mathematical work14801461Kimi K2.6
MathArena24.5%Not measuredOnly Kimi K2.6 measured
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index90
Knowledge benchmarks for Kimi K2.6 and Nemotron 3 Ultra
BenchmarkKimi K2.6Nemotron 3 UltraLeader
MMLU Pro87.6%85.8%Kimi K2.6
LegalBench (Vals AI)84.7%82.1%Kimi K2.6
CaseLaw (Vals AI)61.2%Not measuredOnly Kimi K2.6 measured
CorpFin (Vals AI)66.7%65.5%Kimi K2.6
TaxEval (Vals AI)74.7%73.1%Kimi K2.6
MortgageTax (Vals AI)65.8%Not measuredOnly Kimi K2.6 measured
MedCode (Vals AI)40.1%38.6%Kimi K2.6
SimpleQA Verified34.9%Not measuredOnly Kimi K2.6 measured
LMArena Text: science14681465Kimi K2.6
LMArena Text: medicine and healthcare14571456Kimi K2.6
LMArena Text: legal and government14621452Kimi K2.6
LMArena Text: business and finance14451434Kimi K2.6
Neither model has a result on the other 8 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index80
Web design benchmarks for Kimi K2.6 and Nemotron 3 Ultra
BenchmarkKimi K2.6Nemotron 3 UltraLeader
Design Arena: websites12691145Kimi K2.6
Design Arena: UI components12641135Kimi K2.6
Design Arena: game dev12501138Kimi K2.6
Design Arena: data viz12491141Kimi K2.6
Design Arena: 3D12671131Kimi K2.6
Design Arena: all code categories12711146Kimi K2.6
Design Arena: SVG11801069Kimi K2.6
Design Arena: ASCII art11651100Kimi K2.6
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index173
General benchmarks for Kimi K2.6 and Nemotron 3 Ultra
BenchmarkKimi K2.6Nemotron 3 UltraLeader
Public Benefits Bench (Vals AI)56.6%Not measuredOnly Kimi K2.6 measured
SAGE (Vals AI)50.2%Not measuredOnly Kimi K2.6 measured
MedScribe (Vals AI)78.2%Not measuredOnly Kimi K2.6 measured
Vals Multimodal Index56.4%Not measuredOnly Kimi K2.6 measured
IFBench76.0%81.4%Nemotron 3 Ultra
Long context reasoning (AA-LCR)81.0%79.3%Kimi K2.6
DTBench90.9%90.1%Kimi K2.6
LMCA37.3%36.9%Kimi K2.6
Furniture assembly21.7%Not measuredOnly Kimi K2.6 measured
ExploitBench18.4%Not measuredOnly Kimi K2.6 measured
LMArena Text14551445Kimi K2.6
LMArena Text: instruction following14511418Kimi K2.6
LMArena Text: creative writing14341399Kimi K2.6
LMArena Vision1282Not measuredOnly Kimi K2.6 measured
LMArena Text: English14601455Kimi K2.6
LMArena Text: non-English14461427Kimi K2.6
LMArena Text: Chinese15201497Kimi K2.6
LMArena Text: German14511472Nemotron 3 Ultra
LMArena Text: Japanese1443Not measuredOnly Kimi K2.6 measured
LMArena Text: Korean14271384Kimi K2.6
LMArena Text: French14711472Nemotron 3 Ultra
LMArena Text: Spanish14641455Kimi K2.6
LMArena Text: Russian14461417Kimi K2.6
LMArena Text: Polish14381385Kimi K2.6
LMArena Text: multi-turn14531411Kimi K2.6
LMArena Text: longer queries14681437Kimi K2.6
LMArena Text: writing and language14391406Kimi K2.6
LMArena Text: entertainment and media14281397Kimi K2.6
LMArena Vision: English1287Not measuredOnly Kimi K2.6 measured
LMArena Vision: Chinese1346Not measuredOnly Kimi K2.6 measured
LMArena Vision: reading text1291Not measuredOnly Kimi K2.6 measured
LMArena Vision: humor1280Not measuredOnly Kimi K2.6 measured
LMArena Vision: creative writing1273Not measuredOnly Kimi K2.6 measured
LMArena Document1451Not measuredOnly Kimi K2.6 measured
EQ-Bench 41202Not measuredOnly Kimi K2.6 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 Kimi K2.6 and Nemotron 3 Ultra
BenchmarkKimi K2.6Nemotron 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

Kimi K2.6$0.0029Fits in one request
Nemotron 3 Ultra$0.0018Fits in one request

Nemotron 3 Ultra costs less

Repository review

50K input + 3K output tokens

Kimi K2.6$0.059Fits in one request
Nemotron 3 Ultra$0.037Fits in one request

Nemotron 3 Ultra costs less

Agent loop

200K input + 10K output tokens

Kimi K2.6$0.230Fits 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 Kimi K2.6 and Nemotron 3 Ultra
SpecificationMoonshotAI Kimi K2.6NVIDIA Nemotron 3 Ultra
MakerMoonshot AINVIDIA
WeightsOpen weightsOpen weights
ReleasedApril 20, 2026June 4, 2026
Context window262K262K
Input $/Mtok$0.95$0.60
Output $/Mtok$4.00$2.40
Coding index52.130.0
Independent measurements behind it33
Cost per solved task$0.35Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Kimi K2.6 better than Nemotron 3 Ultra for coding?

Pick Kimi K2.6 for coding: it scores 52.1 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra. Pick Nemotron 3 Ultra for output tokens 1.7x cheaper ($2.40 vs $4.00 per million) and work measured by Mystery game puzzles or IFBench, where it leads.

Which is cheaper, Kimi K2.6 or Nemotron 3 Ultra?

Kimi K2.6 costs $0.95 per million input tokens and $4.00 per million output tokens; Nemotron 3 Ultra costs $0.60 and $2.40. Cost per solved task is known for Kimi K2.6 only.

Which has the bigger context window, Kimi K2.6 or Nemotron 3 Ultra?

Neither: both take 262K tokens.

How many benchmarks is the Kimi K2.6 vs Nemotron 3 Ultra comparison based on?

68 benchmarks have a result for both models as of October 22, 2026. Kimi K2.6'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.

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/kimi-k2-6-vs-nvidia-nemotron-3-ultra-550b-a55b" title="Kimi K2.6 vs Nemotron 3 Ultra, 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/kimi-k2-6-vs-nvidia-nemotron-3-ultra-550b-a55b">LLMBenchmark.ai, Kimi K2.6 vs Nemotron 3 Ultra</a></p>