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Model comparison

Claude Sonnet 4.6 vs Nemotron 3 Ultra

Data verified

Head-to-head evidence from 18 shared benchmark results across 6 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

65/100
Margin
5.0pts
← winning
60/100
3 category wins0 category wins

Verified leaderboard positions: Claude Sonnet 4.6 #13; Nemotron 3 Ultra #24

BenchAlign evidence: Claude Sonnet 4.6 supported; Nemotron 3 Ultra not scored. Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. Claude Sonnet 4.6 and Nemotron 3 Ultra share 18 comparable benchmark results. 3 of 8 categories are comparable. 16 results are unique to Claude Sonnet 4.6; 21 to Nemotron 3 Ultra.

Updated July 16, 2026
Shared results
18
Claude Sonnet 4.6 only
16
Nemotron 3 Ultra only
21
Comparable categories
3 / 8

Pick Claude Sonnet 4.6 if you want the stronger benchmark profile. Nemotron 3 Ultra only becomes the better choice if you want the cheaper token bill or you need the larger 1M context window.

Confidence note. This is a partial-evidence comparison with 18 shared benchmark results across 6 evidence categories; 3 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.

Why this result

Claude Sonnet 4.6 is clearly ahead on the provisional aggregate, 76 to 60. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Claude Sonnet 4.6's sharpest advantage is in agentic, where it averages 65.2 against 51.3. The single biggest benchmark swing on the page is HLE, 49% to 26.7%.

Claude Sonnet 4.6 is also the more expensive model on tokens at $3.00 input / $15.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Nemotron 3 Ultra. That is roughly Infinityx on output cost alone. Nemotron 3 Ultra is the reasoning model in the pair, while Claude Sonnet 4.6 is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. Nemotron 3 Ultra gives you the larger context window at 1M, compared with 200K for Claude Sonnet 4.6.

Category breakdown

Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.

Category scores and score margins for Claude Sonnet 4.6 and Nemotron 3 Ultra
CategoryClaude Sonnet 4.6ΔNemotron 3 Ultra
AgenticClaude Sonnet 4.665.2Margin← 13.9Nemotron 3 Ultra51.3
KnowledgeClaude Sonnet 4.666.2Margin← 12.0Nemotron 3 Ultra54.2
CodingClaude Sonnet 4.669.1Margin← 10.8Nemotron 3 Ultra58.3
ReasoningClaude Sonnet 4.6Not measuredMarginNo overlapNemotron 3 Ultra61.9
MathClaude Sonnet 4.626.4MarginNo overlapNemotron 3 UltraNot measured
MultilingualClaude Sonnet 4.6Not measuredMarginNo overlapNemotron 3 Ultra83.0
MultimodalClaude Sonnet 4.677.4MarginNo overlapNemotron 3 UltraNot measured
Inst. FollowingClaude Sonnet 4.6Not measuredMarginNo overlapNemotron 3 Ultra81.7

Decisive benchmark drivers

The largest measured benchmark gaps in this matchup, with exact reported values.

More
A · Claude Sonnet 4.6B · Nemotron 3 Ultra

  1. HLE

    Knowledge
    Source ↗
    A 49%B 26.7%
    Winner: Claude Sonnet 4.6Δ 22.3
    HLE: Claude Sonnet 4.6 scored 49%; Nemotron 3 Ultra scored 26.7%. Claude Sonnet 4.6 wins this benchmark.

  2. SWE-bench Verified

    Coding
    Source ↗
    A 79.6%B 71.9%
    Winner: Claude Sonnet 4.6Δ 7.7
    SWE-bench Verified: Claude Sonnet 4.6 scored 79.6%; Nemotron 3 Ultra scored 71.9%. Claude Sonnet 4.6 wins this benchmark.

  3. MMLU-Pro

    Knowledge
    Source ↗
    A 79.2%B 86.8%
    Winner: Nemotron 3 UltraΔ 7.6
    MMLU-Pro: Claude Sonnet 4.6 scored 79.2%; Nemotron 3 Ultra scored 86.8%. Nemotron 3 Ultra wins this benchmark.

  4. GPQA

    Knowledge
    Source ↗
    A 89.9%B 87%
    Winner: Claude Sonnet 4.6Δ 2.9
    GPQA: Claude Sonnet 4.6 scored 89.9%; Nemotron 3 Ultra scored 87%. Claude Sonnet 4.6 wins this benchmark.

  5. Terminal-Bench 2.0

    Agentic
    Source ↗
    A 59.1%B 56.4%
    Winner: Claude Sonnet 4.6Δ 2.7
    Terminal-Bench 2.0: Claude Sonnet 4.6 scored 59.1%; Nemotron 3 Ultra scored 56.4%. Claude Sonnet 4.6 wins this benchmark.

Operational comparison

Runtime and commercial metrics are compared only when both models have a complete sourced value.

MetricClaude Sonnet 4.6Nemotron 3 UltraComparison
Input / output priceUSD per 1M tokensClaude Sonnet 4.6$3 input / $15 outputNemotron 3 Ultra$0 input / $0 outputNemotron 3 Ultra has the lower combined listed price.
Generation speedtokens per secondClaude Sonnet 4.644 tok/sNemotron 3 UltraNot availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenClaude Sonnet 4.61.48 sNemotron 3 UltraNot availableA complete latency comparison is not available.
Context windowmaximum listed tokensClaude Sonnet 4.6200KNemotron 3 Ultra1MNemotron 3 Ultra lists the larger context window.

Benchmark Deep Dive

AgenticClaude Sonnet 4.6 wins
BenchmarkClaude Sonnet 4.6Nemotron 3 UltraResult
Terminal-Bench 2.0Source 59.1%56.4%Claude Sonnet 4.6 leads
OSWorld-VerifiedSource 72.1%—Not comparable
Claw-EvalSource 67.8%—Not comparable
CyberGymSource 65.2%—Not comparable
τ²-bench resultsSource 79.5%83.3%Nemotron 3 Ultra leads
Gert LabsSource 62.92%—Not comparable
OSWorld 2.0Source 8.3%—Not comparable
JobBenchSource 36.9%—Not comparable
PinchBenchSource —90.0%Not comparable
BrowseCompSource —44.4%Not comparable
τ³-bench resultsSource —70.9%Not comparable
GDPval-AASource —33.2%Not comparable
HLE w/ toolsSource —37.4%Not comparable
AA Agentic IndexSource —27.4%Not comparable
GDPval-AASource —1164Not comparable
AA BriefcaseSource —870Not comparable
AA EnterpriseOps-GymSource —28.9%Not comparable
AA Harvey LABSource —3.3%Not comparable
CodingClaude Sonnet 4.6 wins
BenchmarkClaude Sonnet 4.6Nemotron 3 UltraResult
SWE-bench VerifiedSource 79.6%71.9%Claude Sonnet 4.6 leads
SWE-RebenchSource 60.7%—Not comparable
React Native EvalsSource 80.6%—Not comparable
Vibe Code BenchSource 51.48%—Not comparable
cursorBench31Source 48.8%—Not comparable
Terminal-Bench HardSource 46.2%36.4%Claude Sonnet 4.6 leads
AA-SciCodeSource 46.9%39.9%Claude Sonnet 4.6 leads
FrontierCodeSource 24.3%—Not comparable
SWE MultilingualSource —67.7%Not comparable
LiveCodeBench v6Source —89.0%Not comparable
SciCodeSource —44.6%Not comparable
Terminal-Bench 2.0Source —56.4%Not comparable
AA Coding IndexSource —49.3%Not comparable
Reasoning
BenchmarkClaude Sonnet 4.6Nemotron 3 UltraResult
AA-LCRSource 57.7%67.0%Nemotron 3 Ultra leads
CritPtSource 0.9%3.1%Nemotron 3 Ultra leads
LongBench v2Source —61.9%Not comparable
KnowledgeClaude Sonnet 4.6 wins
BenchmarkClaude Sonnet 4.6Nemotron 3 UltraResult
GPQASource 89.9%87%Claude Sonnet 4.6 leads
SuperGPQASource 95%—Not comparable
MMLU-ProSource 79.2%86.8%Nemotron 3 Ultra leads
HLESource 49%26.7%Claude Sonnet 4.6 leads
Artificial Analysis Intelligence IndexSource 35.9%37.8%Nemotron 3 Ultra leads
AA-GPQA DiamondSource 79.9%86.7%Nemotron 3 Ultra leads
AA-HLESource 13.2%26.6%Nemotron 3 Ultra leads
AA-Omniscience IndexSource -2.9%-0.8%Nemotron 3 Ultra leads
AA-Omniscience AccuracySource 38.0%21.6%Claude Sonnet 4.6 leads
AA-Omniscience Hallucination RateSource 65.9%28.5%Nemotron 3 Ultra leads
GPQA-DSource —87.0%Not comparable
HLE w/o toolsSource —26.7%Not comparable
AA Openness IndexSource —83.3%Not comparable
Math
BenchmarkClaude Sonnet 4.6Nemotron 3 UltraResult
FrontierMath v2 (Tiers 1-3)Source 32.400%—Not comparable
FrontierMath v2 (Tier 4)Source 8.300%—Not comparable
Multilingual
BenchmarkClaude Sonnet 4.6Nemotron 3 UltraResult
MMLU-ProXSource —83%Not comparable
Multimodal
BenchmarkClaude Sonnet 4.6Nemotron 3 UltraResult
CharXivSource 77.4%—Not comparable
AA-MMMU-ProSource 70.6%—Not comparable
Design Arena WebsiteSource 13191132Claude Sonnet 4.6 leads
Inst. Following
BenchmarkClaude Sonnet 4.6Nemotron 3 UltraResult
AA-IFBenchSource 41.2%81.4%Nemotron 3 Ultra leads
IFBenchSource —81.7%Not comparable
Frequently Asked Questions (4)

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

Claude Sonnet 4.6 is ahead on BenchLM's provisional leaderboard, 76 to 60. The biggest single separator in this matchup is HLE, where the scores are 49% and 26.7%.

Which is better for knowledge tasks, Claude Sonnet 4.6 or Nemotron 3 Ultra?

Claude Sonnet 4.6 has the edge for knowledge tasks in this comparison, averaging 66.2 versus 54.2. Inside this category, AA-Omniscience Hallucination Rate is the benchmark that creates the most daylight between them.

Which is better for coding, Claude Sonnet 4.6 or Nemotron 3 Ultra?

Claude Sonnet 4.6 has the edge for coding in this comparison, averaging 69.1 versus 58.3. Inside this category, Terminal-Bench Hard is the benchmark that creates the most daylight between them.

Which is better for agentic tasks, Claude Sonnet 4.6 or Nemotron 3 Ultra?

Claude Sonnet 4.6 has the edge for agentic tasks in this comparison, averaging 65.2 versus 51.3. Inside this category, τ²-bench results is the benchmark that creates the most daylight between them.

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