Model comparison
LFM2.5-8B-A1B vs Nemotron 3 Ultra
Head-to-head evidence from 13 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Verified leaderboard positions: LFM2.5-8B-A1B unranked; Nemotron 3 Ultra #24
BenchAlign evidence: LFM2.5-8B-A1B estimated; Nemotron 3 Ultra 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 13 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 16, 2026- Shared results
- 13
- LFM2.5-8B-A1B only
- 5
- Nemotron 3 Ultra only
- 26
- Comparable categories
- 1 / 8
Pick Nemotron 3 Ultra if you want the stronger benchmark profile. LFM2.5-8B-A1B only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Confidence note. This is a partial-evidence comparison with 13 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
Nemotron 3 Ultra is clearly ahead on the provisional aggregate, 60 to 37. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Nemotron 3 Ultra's sharpest advantage is in instruction following, where it averages 81.7 against 68.8. The single biggest benchmark swing on the page is IFBench, 56.5% to 81.7%.
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 | LFM2.5-8B-A1B | Δ | Nemotron 3 Ultra |
|---|---|---|---|
| Inst. Following | LFM2.5-8B-A1B68.8 | Margin→ 12.9 | Nemotron 3 Ultra81.7 |
| Agentic | LFM2.5-8B-A1BNot measured | MarginNo overlap | Nemotron 3 Ultra51.3 |
| Coding | LFM2.5-8B-A1BNot measured | MarginNo overlap | Nemotron 3 Ultra58.3 |
| Reasoning | LFM2.5-8B-A1BNot measured | MarginNo overlap | Nemotron 3 Ultra61.9 |
| Knowledge | LFM2.5-8B-A1BNot measured | MarginNo overlap | Nemotron 3 Ultra54.2 |
| Math | LFM2.5-8B-A1B50.0 | MarginNo overlap | Nemotron 3 UltraNot measured |
| Multilingual | LFM2.5-8B-A1BNot measured | MarginNo overlap | Nemotron 3 Ultra83.0 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
IFBench
Inst. FollowingA 56.5%B 81.7%Winner: Nemotron 3 UltraΔ 25.2IFBench: 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.
| Metric | LFM2.5-8B-A1B | Nemotron 3 Ultra | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | LFM2.5-8B-A1B$0 input / $0 output | Nemotron 3 Ultra$0 input / $0 output | Listed prices are equal. |
| Generation speedtokens per second | LFM2.5-8B-A1BNot available | Nemotron 3 UltraNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | LFM2.5-8B-A1BNot available | Nemotron 3 UltraNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | LFM2.5-8B-A1B128K | Nemotron 3 Ultra1M | Nemotron 3 Ultra lists the larger context window. |
Benchmark Deep Dive
Agentic13 benchmarks
| Benchmark | LFM2.5-8B-A1B | Nemotron 3 Ultra | Result |
|---|---|---|---|
| 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 | — | 1164 | Not comparable |
| AA BriefcaseSource | — | 870 | Not comparable |
| AA EnterpriseOps-GymSource | — | 28.9% | Not comparable |
| AA Harvey LABSource | — | 3.3% | Not comparable |
Coding8 benchmarks
| Benchmark | LFM2.5-8B-A1B | Nemotron 3 Ultra | Result |
|---|---|---|---|
| Terminal-Bench HardSource | 4.5% | 36.4% | Nemotron 3 Ultra leads |
| AA-SciCodeSource | 7.8% | 39.9% | Nemotron 3 Ultra leads |
| SWE-bench VerifiedSource | — | 71.9% | 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 |
Reasoning3 benchmarks
Knowledge12 benchmarks
| Benchmark | LFM2.5-8B-A1B | Nemotron 3 Ultra | Result |
|---|---|---|---|
| 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 |
Math3 benchmarks
Multilingual1 benchmarks
| Benchmark | LFM2.5-8B-A1B | Nemotron 3 Ultra | Result |
|---|---|---|---|
| MMLU-ProXSource | — | 83% | Not comparable |
Multimodal1 benchmarks
| Benchmark | LFM2.5-8B-A1B | Nemotron 3 Ultra | Result |
|---|---|---|---|
| Design Arena WebsiteSource | — | 1132 | Not comparable |
Frequently Asked Questions (2)
Which is better, LFM2.5-8B-A1B or Nemotron 3 Ultra?
Nemotron 3 Ultra is ahead on BenchLM's provisional leaderboard, 60 to 37. The biggest single separator in this matchup is IFBench, where the scores are 56.5% and 81.7%.
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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