# LFM2.5-2.6B vs Nemotron 3 Ultra

> Side-by-side benchmark comparison for LFM2.5-2.6B and Nemotron 3 Ultra across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/lfm2-5-2-6b-vs-nemotron-3-ultra
- Last updated: September 18, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick Nemotron 3 Ultra if you want the stronger benchmark profile. LFM2.5-2.6B only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Nemotron 3 Ultra leads overall 40.5 to 39.9.
- The clearest category separation is in instruction following, where the averages are 38.1 for LFM2.5-2.6B and 88.1 for Nemotron 3 Ultra.
- The biggest single benchmark swing is τ³-bench results in Agentic, with scores of 5.7% and 70.9%.
- Nemotron 3 Ultra also has the larger context window at 1M.

## Model Snapshot

| Property | LFM2.5-2.6B | Nemotron 3 Ultra |
|----------|----------|----------|
| Creator | LiquidAI | NVIDIA |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 128K | 1M |
| Overall Score | 39.9 | 40.5 |
| Benchmarks Covered | 7 | 24 |
| Pricing (input/output) | $0.00 / $0.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- LFM2.5-2.6B public-lane score: 37.2 (Estimated · #131/154)
- Nemotron 3 Ultra public-lane score: 26.9 (Supported · #147/154)

| Benchmark | LFM2.5-2.6B | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| BFCL v4 | 56.9% | Coming soon | Coming soon |
| τ³-bench results | 5.7% | 70.9% | Nemotron 3 Ultra |
| Claw-Eval | 62.9% | Coming soon | Coming soon |
| PinchBench | 68.2% | 90.0% | Nemotron 3 Ultra |
| Terminal-Bench 2.0 | Coming soon | 56.4% | Coming soon |
| BrowseComp | Coming soon | 44.4% | Coming soon |
| HLE w/ tools | Coming soon | 37.4% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 50.9% | Coming soon |

### Coding

- Winner: Coming soon
- LFM2.5-2.6B public-lane score: 39.2 (Estimated · #125/154)
- Nemotron 3 Ultra public-lane score: 26.6 (Supported · #149/154)

| Benchmark | LFM2.5-2.6B | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench v6 | 59.4% | 89.0% | Nemotron 3 Ultra |
| SWE-bench Verified | Coming soon | 71.9% | Coming soon |
| SWE Multilingual | Coming soon | 67.7% | Coming soon |
| SciCode | Coming soon | 44.6% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 56.4% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 86.0% | Coming soon |
| SWE-bench (Vals) | Coming soon | 69.0% | Coming soon |

### Reasoning

- Winner: Coming soon
- LFM2.5-2.6B public-lane score: 24.9 (Unranked · 2 rankable rows)
- Nemotron 3 Ultra public-lane score: 48.7 (Unranked · 1 rankable row)

| Benchmark | LFM2.5-2.6B | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| CritPt | Coming soon | 3.1% | Coming soon |
| LongBench v2 | Coming soon | 61.9% | Coming soon |

### Knowledge

- Winner: Coming soon
- LFM2.5-2.6B public-lane score: 37 (Estimated · #151/184)
- Nemotron 3 Ultra public-lane score: 44.8 (Estimated · #113/184)

| Benchmark | LFM2.5-2.6B | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 87% | Coming soon |
| GPQA-D | Coming soon | 87.0% | Coming soon |
| HLE | Coming soon | 26.7% | Coming soon |
| HLE w/o tools | Coming soon | 26.7% | Coming soon |
| MMLU-Pro | Coming soon | 86.8% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 86.1% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 85.8% | Coming soon |

### Instruction Following

- Winner: Nemotron 3 Ultra
- LFM2.5-2.6B public-lane score: 38.1 (#104/124)
- Nemotron 3 Ultra public-lane score: 88.1 (#26/124)

| Benchmark | LFM2.5-2.6B | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| IFBench | 59.2% | 81.7% | Nemotron 3 Ultra |

### Multilingual

- Winner: Coming soon
- LFM2.5-2.6B public-lane score: Coming soon
- Nemotron 3 Ultra public-lane score: 47.4 (#7/12)

| Benchmark | LFM2.5-2.6B | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | Coming soon | 83% | Coming soon |

### Mathematics

- Winner: Coming soon
- LFM2.5-2.6B public-lane score: Coming soon
- Nemotron 3 Ultra public-lane score: Coming soon

| Benchmark | LFM2.5-2.6B | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | 51.9% | Coming soon | Coming soon |

## FAQ

### Which is better overall, LFM2.5-2.6B or Nemotron 3 Ultra?

Nemotron 3 Ultra is ahead overall on BenchLM right now.

### Where is the biggest gap between LFM2.5-2.6B and Nemotron 3 Ultra?

The widest category gap is in instruction following, where the averages are 38.1 for LFM2.5-2.6B and 88.1 for Nemotron 3 Ultra.

### How many benchmarks does LFM2.5-2.6B cover on BenchLM?

LFM2.5-2.6B currently has 7 sourced benchmark scores on BenchLM.

### How many benchmarks does Nemotron 3 Ultra cover on BenchLM?

Nemotron 3 Ultra currently has 24 sourced benchmark scores on BenchLM.

## Related Comparisons

- [LFM2.5-2.6B vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-lfm2-5-2-6b)
- [Nemotron 3 Ultra vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-nemotron-3-ultra)
- [LFM2.5-2.6B vs GPT-6 Astra](/compare/gpt-6-astra-vs-lfm2-5-2-6b)
- [Nemotron 3 Ultra vs GPT-6 Astra](/compare/gpt-6-astra-vs-nemotron-3-ultra)

## Explore More

- [LFM2.5-2.6B profile](/models/lfm2-5-2-6b)
- [Nemotron 3 Ultra profile](/models/nemotron-3-ultra)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)