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Model comparison

LFM2.5-8B-A1B vs Nemotron 3 Ultra

Data verified

Head-to-head evidence from 12 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

41.42/100
No comparison
N/A
0 category wins1 category wins

Public leaderboard positions: LFM2.5-8B-A1B #166 (Estimated); Nemotron 3 Ultra unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. LFM2.5-8B-A1B and Nemotron 3 Ultra share 12 comparable benchmark results. 1 of 8 categories are comparable. 5 results are unique to LFM2.5-8B-A1B; 26 to Nemotron 3 Ultra.

Updated July 18, 2026
Shared results
12
LFM2.5-8B-A1B only
5
Nemotron 3 Ultra only
26
Comparable categories
1 / 8

Treat this as a split decision. LFM2.5-8B-A1B makes more sense if its workflow fits your team better; Nemotron 3 Ultra is the better fit if instruction following is the priority or you need the larger 1M context window.

Confidence note. This is a partial-evidence comparison with 12 shared benchmark results across 5 evidence categories; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.

Why this result

LFM2.5-8B-A1B 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.

Nemotron 3 Ultra gives you the larger context window at 1M, compared with 128K for LFM2.5-8B-A1B.

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 LFM2.5-8B-A1B and Nemotron 3 Ultra
CategoryLFM2.5-8B-A1BΔNemotron 3 Ultra
Inst. FollowingLFM2.5-8B-A1B68.8Margin→ 12.9Nemotron 3 Ultra81.7
AgenticLFM2.5-8B-A1BNot measuredMarginNo overlapNemotron 3 Ultra51.3
CodingLFM2.5-8B-A1BNot measuredMarginNo overlapNemotron 3 Ultra58.3
ReasoningLFM2.5-8B-A1BNot measuredMarginNo overlapNemotron 3 Ultra61.9
KnowledgeLFM2.5-8B-A1BNot measuredMarginNo overlapNemotron 3 Ultra53.8
MathLFM2.5-8B-A1B50.0MarginNo overlapNemotron 3 UltraNot measured
MultilingualLFM2.5-8B-A1BNot measuredMarginNo overlapNemotron 3 Ultra83.0

Decisive benchmark drivers

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

More
A · LFM2.5-8B-A1BB · Nemotron 3 Ultra

  1. IFBench

    Inst. Following
    Source ↗
    A 56.5%B 81.7%
    Winner: Nemotron 3 UltraΔ 25.2
    IFBench: LFM2.5-8B-A1B scored 56.5%; Nemotron 3 Ultra scored 81.7%. Nemotron 3 Ultra wins this benchmark.

Operational comparison

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

MetricLFM2.5-8B-A1BNemotron 3 UltraComparison
Input / output priceUSD per 1M tokensLFM2.5-8B-A1B$0 input / $0 outputNemotron 3 Ultra$0 input / $0 outputListed prices are equal.
Generation speedtokens per secondLFM2.5-8B-A1BNot availableNemotron 3 UltraNot availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenLFM2.5-8B-A1BNot availableNemotron 3 UltraNot availableA complete latency comparison is not available.
Context windowmaximum listed tokensLFM2.5-8B-A1B128KNemotron 3 Ultra1MNemotron 3 Ultra lists the larger context window.

Benchmark Deep Dive

Agentic
BenchmarkLFM2.5-8B-A1BNemotron 3 UltraResult
BFCL v4Source 49.7%—Not comparable
τ²-bench resultsSource 16.1%83.3%Nemotron 3 Ultra leads
Terminal-Bench 2.0Source —56.4%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
terminalBenchHardSource —36.4%Not comparable
Coding
BenchmarkLFM2.5-8B-A1BNemotron 3 UltraResult
AA-SciCodeSource 7.8%39.9%Nemotron 3 Ultra leads
SWE-bench VerifiedSource —71.9%Not comparable
SWE MultilingualSource —67.7%Not comparable
SciCodeSource —44.6%Not comparable
Terminal-Bench 2.0Source —56.4%Not comparable
AA Coding IndexSource —49.3%Not comparable
Reasoning
BenchmarkLFM2.5-8B-A1BNemotron 3 UltraResult
AA-LCRSource 0.0%67.0%Nemotron 3 Ultra leads
CritPtSource 0.0%3.1%Nemotron 3 Ultra leads
LongBench v2Source —61.9%Not comparable
Knowledge
BenchmarkLFM2.5-8B-A1BNemotron 3 UltraResult
AA-GPQA DiamondSource 51.3%86.7%Nemotron 3 Ultra leads
AA-HLESource 6.9%26.6%Nemotron 3 Ultra leads
AA-Omniscience IndexSource -33.3%-0.8%Nemotron 3 Ultra leads
AA-Omniscience AccuracySource 9.4%21.6%Nemotron 3 Ultra leads
AA-Omniscience Hallucination RateSource 47.0%28.5%Nemotron 3 Ultra leads
Artificial Analysis Intelligence IndexSource 8.3%37.8%Nemotron 3 Ultra leads
GPQASource —87%Not comparable
GPQA-DSource —87.0%Not comparable
HLESource —26.7%Not comparable
HLE w/o toolsSource —26.7%Not comparable
MMLU-ProSource —86.8%Not comparable
AA Openness IndexSource —83.3%Not comparable
Math
BenchmarkLFM2.5-8B-A1BNemotron 3 UltraResult
MATH-500Source 88.8%—Not comparable
AIME 2025Source 42.5%—Not comparable
AIME26Source 50.0%—Not comparable
Multilingual
BenchmarkLFM2.5-8B-A1BNemotron 3 UltraResult
MMLU-ProXSource —83%Not comparable
Multimodal
BenchmarkLFM2.5-8B-A1BNemotron 3 UltraResult
Design Arena WebsiteSource —1131Not comparable
Inst. FollowingNemotron 3 Ultra wins
BenchmarkLFM2.5-8B-A1BNemotron 3 UltraResult
IFEvalSource 91.8%—Not comparable
IFBenchSource 56.5%81.7%Nemotron 3 Ultra leads
AA-IFBenchSource 55.6%81.4%Nemotron 3 Ultra leads
Frequently Asked Questions (2)

Which is better, LFM2.5-8B-A1B or Nemotron 3 Ultra?

LFM2.5-8B-A1B 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 instruction following, LFM2.5-8B-A1B or Nemotron 3 Ultra?

Nemotron 3 Ultra has the edge for instruction following in this comparison, averaging 81.7 versus 68.8. Inside this category, AA-IFBench is the benchmark that creates the most daylight between them.

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