# LongCat-2.5 vs Nemotron 3 Ultra

> Side-by-side benchmark comparison for LongCat-2.5 and Nemotron 3 Ultra across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/longcat-2-5-vs-nemotron-3-ultra
- Last updated: November 9, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Nemotron 3 Ultra leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Nemotron 3 Ultra has the higher overall point estimate 46.51 to 0. Conditional score ranges do not establish rank confidence.
- The biggest single benchmark swing is BrowseComp in Agentic, with scores of 91.9% and 44.4%.
- Nemotron 3 Ultra is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | LongCat-2.5 | Nemotron 3 Ultra |
|----------|----------|----------|
| Creator | Meituan | NVIDIA |
| Type | Open Weight | Open Weight |
| Reasoning | Hybrid | Reasoning |
| Context | 1M | 1M |
| Overall Score | null | 46.51 |
| Benchmarks Covered | 22 | 25 |
| Pricing (input/output) | $0.30 / $1.20 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- LongCat-2.5 public-lane score: Coming soon
- Nemotron 3 Ultra public-lane score: 25.1 (Supported · #112/132)

| Benchmark | LongCat-2.5 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 88.4% | 56.4% | LongCat-2.5 |
| Terminal-Bench 4.0 | 38.50% | Coming soon | Coming soon |
| BrowseComp | 91.9% | 44.4% | LongCat-2.5 |
| AutomationBench | 51.8% | Coming soon | Coming soon |
| HLE w/ tools | 63.1% | 37.4% | LongCat-2.5 |
| Agents' Last Exam | 38.5% | Coming soon | Coming soon |
| MCP Atlas | 83.1% | Coming soon | Coming soon |
| JobBench | 65.4% | Coming soon | Coming soon |
| skillsBench | 63.3% | Coming soon | Coming soon |
| SpreadsheetBench 2 | 34.9% | Coming soon | Coming soon |
| Claw-Eval | 78.3% | Coming soon | Coming soon |
| PinchBench | Coming soon | 90.0% | Coming soon |
| τ³-bench results | Coming soon | 70.9% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 50.9% | Coming soon |
| MazeBench | Coming soon | 0% | Coming soon |

### Coding

- Winner: Not comparable
- LongCat-2.5 public-lane score: Coming soon
- Nemotron 3 Ultra public-lane score: 22.7 (Supported · #131/158)

| Benchmark | LongCat-2.5 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 88.4% | 56.4% | LongCat-2.5 |
| ProgramBench | 25.5% | Coming soon | Coming soon |
| DeepSWE | 64.6% | Coming soon | Coming soon |
| PaperBench | 82.1% | Coming soon | Coming soon |
| SWE-Atlas Codebase QnA | 58.3% | Coming soon | Coming soon |
| NL2Repo | 60.5% | Coming soon | Coming soon |
| SWE-bench Verified | Coming soon | 71.9% | Coming soon |
| SWE Multilingual | Coming soon | 67.7% | Coming soon |
| LiveCodeBench v6 | Coming soon | 89.0% | Coming soon |
| SciCode | Coming soon | 44.6% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 86.0% | Coming soon |
| SWE-bench (Vals) | Coming soon | 69.0% | Coming soon |

### Reasoning

- Winner: Not comparable
- LongCat-2.5 public-lane score: Coming soon
- Nemotron 3 Ultra public-lane score: 39.3 (Estimated · #82/157)

| Benchmark | LongCat-2.5 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| CritPt | Coming soon | 3.1% | Coming soon |
| LongBench v2 | Coming soon | 61.9% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- LongCat-2.5 public-lane score: Coming soon
- Nemotron 3 Ultra public-lane score: Coming soon

| Benchmark | LongCat-2.5 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| Vision2Web | 78.6% | Coming soon | Coming soon |
| CharXiv | 90.2% | Coming soon | Coming soon |
| MathVision w/ Python | 96.5% | Coming soon | Coming soon |
| Video-MME | 85.2% | Coming soon | Coming soon |

### Knowledge

- Winner: Not comparable
- LongCat-2.5 public-lane score: Coming soon
- Nemotron 3 Ultra public-lane score: 49.6 (Estimated · #81/179)

| Benchmark | LongCat-2.5 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| FrontierScience | 77% | Coming soon | Coming soon |
| 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 |

### Multilingual

- Winner: Not comparable
- LongCat-2.5 public-lane score: Coming soon
- Nemotron 3 Ultra public-lane score: 89.2 (#7/17)

| Benchmark | LongCat-2.5 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | Coming soon | 83% | Coming soon |

### Instruction Following

- Winner: Not comparable
- LongCat-2.5 public-lane score: Coming soon
- Nemotron 3 Ultra public-lane score: 92.1 (#21/157)

| Benchmark | LongCat-2.5 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 81.7% | Coming soon |

## FAQ

### Which is better overall, LongCat-2.5 or Nemotron 3 Ultra?

Nemotron 3 Ultra has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### How many benchmarks does LongCat-2.5 cover on BenchLM?

LongCat-2.5 currently has 22 sourced benchmark scores on BenchLM.

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

Nemotron 3 Ultra currently has 25 sourced benchmark scores on BenchLM.

## Related Comparisons

- [LongCat-2.5 vs Claude Fable 5.2](/compare/claude-fable-5-2-vs-longcat-2-5)
- [Nemotron 3 Ultra vs Claude Fable 5.2](/compare/claude-fable-5-2-vs-nemotron-3-ultra)
- [LongCat-2.5 vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-longcat-2-5)
- [Nemotron 3 Ultra vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-nemotron-3-ultra)

## Explore More

- [LongCat-2.5 profile](/models/longcat-2-5)
- [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)