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Model comparison

Claude Sonnet 5 vs Nemotron 3 Ultra

Data verified

Head-to-head evidence from 25 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

65.32/100
No comparison
N/A
3 category wins0 category wins

Public leaderboard positions: Claude Sonnet 5 #29 (Estimated); Nemotron 3 Ultra unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. Claude Sonnet 5 and Nemotron 3 Ultra share 25 comparable benchmark results. 3 of 8 categories are comparable. 11 results are unique to Claude Sonnet 5; 13 to Nemotron 3 Ultra.

Updated July 23, 2026
Shared results
25
Claude Sonnet 5 only
11
Nemotron 3 Ultra only
13
Comparable categories
3 / 8

Treat this as a split decision. Claude Sonnet 5 makes more sense if agentic is the priority; Nemotron 3 Ultra is the better fit if you want the cheaper token bill.

Confidence note. This is a partial-evidence comparison with 25 shared benchmark results across 5 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 5 and Nemotron 3 Ultra finish on the same BenchAlign overall score, so this is less about a single winner and more about where the edge shows up. The BenchAlign headline says tie; the benchmark table is where the real choice happens.

Claude Sonnet 5 is also the more expensive model on tokens at $2.00 input / $10.00 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.

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 5 and Nemotron 3 Ultra
CategoryClaude Sonnet 5ΔNemotron 3 Ultra
AgenticClaude Sonnet 581.9Margin← 30.6Nemotron 3 Ultra51.3
CodingClaude Sonnet 576.7Margin← 18.4Nemotron 3 Ultra58.3
KnowledgeClaude Sonnet 557.4Margin← 3.6Nemotron 3 Ultra53.8
ReasoningClaude Sonnet 5Not measuredMarginNo overlapNemotron 3 Ultra61.9
MultilingualClaude Sonnet 5Not measuredMarginNo overlapNemotron 3 Ultra83.0
MultimodalClaude Sonnet 588.3MarginNo overlapNemotron 3 UltraNot measured
Inst. FollowingClaude Sonnet 5Not measuredMarginNo overlapNemotron 3 Ultra81.7

Decisive benchmark drivers

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

More
A · Claude Sonnet 5B · Nemotron 3 Ultra

  1. BrowseComp

    Agentic
    Source ↗
    A 84.7%B 44.4%
    Winner: Claude Sonnet 5Δ 40.3
    BrowseComp: Claude Sonnet 5 scored 84.7%; Nemotron 3 Ultra scored 44.4%. Claude Sonnet 5 wins this benchmark.

  2. HLE

    Knowledge
    Source ↗
    A 57.4%B 26.7%
    Winner: Claude Sonnet 5Δ 30.7
    HLE: Claude Sonnet 5 scored 57.4%; Nemotron 3 Ultra scored 26.7%. Claude Sonnet 5 wins this benchmark.

  3. Terminal-Bench 2.0

    Agentic
    Source ↗
    A 80.4%B 56.4%
    Winner: Claude Sonnet 5Δ 24
    Terminal-Bench 2.0: Claude Sonnet 5 scored 80.4%; Nemotron 3 Ultra scored 56.4%. Claude Sonnet 5 wins this benchmark.

  4. SWE-bench Verified

    Coding
    Source ↗
    A 85.2%B 71.9%
    Winner: Claude Sonnet 5Δ 13.3
    SWE-bench Verified: Claude Sonnet 5 scored 85.2%; Nemotron 3 Ultra scored 71.9%. Claude Sonnet 5 wins this benchmark.

Operational comparison

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

MetricClaude Sonnet 5Nemotron 3 UltraComparison
Input / output priceUSD per 1M tokensClaude Sonnet 5$2 input / $10 outputNemotron 3 Ultra$0 input / $0 outputNemotron 3 Ultra has the lower combined listed price.
Generation speedtokens per secondClaude Sonnet 5Not availableNemotron 3 UltraNot availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenClaude Sonnet 5Not availableNemotron 3 UltraNot availableA complete latency comparison is not available.
Context windowmaximum listed tokensClaude Sonnet 51MNemotron 3 Ultra1MListed context windows are equal.

Benchmark Deep Dive

AgenticClaude Sonnet 5 wins
BenchmarkClaude Sonnet 5Nemotron 3 UltraResult
Terminal-Bench 2.0Source 80.4%56.4%Claude Sonnet 5 leads
BrowseCompSource 84.7%44.4%Claude Sonnet 5 leads
HLE w/ toolsSource 57.4%37.4%Claude Sonnet 5 leads
OSWorld-VerifiedSource 81.2%—Not comparable
GDPval-AASource 16071164Claude Sonnet 5 leads
AA Agentic IndexSource 46.7%27.4%Claude Sonnet 5 leads
GDPval-AASource 55.4%33.2%Claude Sonnet 5 leads
AA BriefcaseSource 1388870Claude Sonnet 5 leads
AA AutomationBenchSource 39.2%—Not comparable
AA EnterpriseOps-GymSource 44.7%28.9%Claude Sonnet 5 leads
AA Harvey LABSource 90.1%81.7%Claude Sonnet 5 leads
AA Tau3 BankingSource 28.2%—Not comparable
aaTerminalBench21Source 80.5%—Not comparable
PinchBenchSource —90.0%Not comparable
τ³-bench resultsSource —70.9%Not comparable
τ²-bench resultsSource —83.3%Not comparable
terminalBenchHardSource —36.4%Not comparable
CodingClaude Sonnet 5 wins
BenchmarkClaude Sonnet 5Nemotron 3 UltraResult
SWE-bench VerifiedSource 85.2%71.9%Claude Sonnet 5 leads
SWE-bench ProSource 63.2%—Not comparable
SWE MultilingualSource 78.3%67.7%Claude Sonnet 5 leads
SWE MultimodalSource 28.1%—Not comparable
Terminal-Bench 2.0Source 80.4%56.4%Claude Sonnet 5 leads
FrontierCode 1.1 MainSource 42.7%—Not comparable
cursorBench32Source 61.5%—Not comparable
AA Coding IndexSource 71.5%49.3%Claude Sonnet 5 leads
AA-SciCodeSource 53.6%39.9%Claude Sonnet 5 leads
SciCodeSource —44.6%Not comparable
Reasoning
BenchmarkClaude Sonnet 5Nemotron 3 UltraResult
AA-LCRSource 70.7%67.0%Claude Sonnet 5 leads
CritPtSource 16.9%3.1%Claude Sonnet 5 leads
LongBench v2Source —61.9%Not comparable
KnowledgeClaude Sonnet 5 wins
BenchmarkClaude Sonnet 5Nemotron 3 UltraResult
HLESource 57.4%26.7%Claude Sonnet 5 leads
HLE w/o toolsSource 43.2%26.7%Claude Sonnet 5 leads
Artificial Analysis Intelligence IndexSource 53.4%37.8%Claude Sonnet 5 leads
AA-GPQA DiamondSource 91.1%86.7%Claude Sonnet 5 leads
AA-HLESource 39.6%26.6%Claude Sonnet 5 leads
AA-Omniscience IndexSource 15.3%-0.8%Claude Sonnet 5 leads
AA-Omniscience AccuracySource 38.3%21.6%Claude Sonnet 5 leads
AA-Omniscience Hallucination RateSource 37.3%28.5%Nemotron 3 Ultra leads
GPQASource —87%Not comparable
GPQA-DSource —87.0%Not comparable
MMLU-ProSource —86.8%Not comparable
AA Openness IndexSource —83.3%Not comparable
Multilingual
BenchmarkClaude Sonnet 5Nemotron 3 UltraResult
MMLU-ProXSource —83%Not comparable
Multimodal
BenchmarkClaude Sonnet 5Nemotron 3 UltraResult
CharXivSource 88.3%—Not comparable
CharXiv w/o toolsSource 77%—Not comparable
AA-MMMU-ProSource 77.3%—Not comparable
Design Arena WebsiteSource 13141129Claude Sonnet 5 leads
Inst. Following
BenchmarkClaude Sonnet 5Nemotron 3 UltraResult
IFBenchSource —81.7%Not comparable
AA-IFBenchSource —81.4%Not comparable
Frequently Asked Questions (4)

Which is better, Claude Sonnet 5 or Nemotron 3 Ultra?

Claude Sonnet 5 and Nemotron 3 Ultra are tied on the BenchAlign overall score, so the right pick depends on which category matters most for your use case.

Which is better for knowledge tasks, Claude Sonnet 5 or Nemotron 3 Ultra?

Claude Sonnet 5 has the edge for knowledge tasks in this comparison, averaging 57.4 versus 53.8. Inside this category, HLE is the benchmark that creates the most daylight between them.

Which is better for coding, Claude Sonnet 5 or Nemotron 3 Ultra?

Claude Sonnet 5 has the edge for coding in this comparison, averaging 76.7 versus 58.3. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.

Which is better for agentic tasks, Claude Sonnet 5 or Nemotron 3 Ultra?

Claude Sonnet 5 has the edge for agentic tasks in this comparison, averaging 81.9 versus 51.3. Inside this category, AA Briefcase is the benchmark that creates the most daylight between them.

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