# Claude Opus 4.8 vs Nemotron 3 Ultra

> Side-by-side benchmark comparison for Claude Opus 4.8 and Nemotron 3 Ultra across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-opus-4-8-vs-nemotron-3-ultra
- Last updated: October 15, 2026

- Shared sourced benchmarks: 14
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Claude Opus 4.8 leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Claude Opus 4.8 has the higher overall point estimate 70.05 to 47.12. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in coding, where the averages are 60.7 for Claude Opus 4.8 and 21.9 for Nemotron 3 Ultra.
- The biggest single benchmark swing is BrowseComp in Agentic, with scores of 84.3% 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 | Claude Opus 4.8 | Nemotron 3 Ultra |
|----------|----------|----------|
| Creator | Anthropic | NVIDIA |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | 70.05 | 47.12 |
| Benchmarks Covered | 40 | 24 |
| Pricing (input/output) | $5.00 / $25.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Claude Opus 4.8
- Claude Opus 4.8 public-lane score: 63.5 (Supported · #19/126)
- Nemotron 3 Ultra public-lane score: 28 (Supported · #95/126)

| Benchmark | Claude Opus 4.8 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 21.1% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 74.6% | 56.4% | Claude Opus 4.8 |
| BrowseComp | 84.3% | 44.4% | Claude Opus 4.8 |
| DeepSearchQA | 93.1% | Coming soon | Coming soon |
| OSWorld-Verified | 83.4% | Coming soon | Coming soon |
| Finance Agent v2 | 53.9% | Coming soon | Coming soon |
| MCP Atlas | 82.2% | Coming soon | Coming soon |
| Toolathlon | 59.9% | Coming soon | Coming soon |
| Gert Labs | 72.97% | Coming soon | Coming soon |
| ResearchClawBench | 21.1% | Coming soon | Coming soon |
| OSWorld 2.0 | 20.6% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 71.9% | 50.9% | Claude Opus 4.8 |
| PinchBench | Coming soon | 90.0% | Coming soon |
| τ³-bench results | Coming soon | 70.9% | Coming soon |
| HLE w/ tools | Coming soon | 37.4% | Coming soon |

### Coding

- Winner: Claude Opus 4.8
- Claude Opus 4.8 public-lane score: 60.7 (Supported · #19/149)
- Nemotron 3 Ultra public-lane score: 21.9 (Supported · #115/149)

| Benchmark | Claude Opus 4.8 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 88.6% | 71.9% | Claude Opus 4.8 |
| SWE-bench Pro | 69.2% | Coming soon | Coming soon |
| SWE Multilingual | 84.4% | 67.7% | Claude Opus 4.8 |
| SWE Multimodal | 38.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 74.6% | 56.4% | Claude Opus 4.8 |
| cursorBench31 | 58.4% | Coming soon | Coming soon |
| CursorBench 3.2 | 62.3% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 46.5% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 87.8% | 86.0% | Claude Opus 4.8 |
| SWE-bench (Vals) | 88.6% | 69.0% | Claude Opus 4.8 |
| PostTrainBench v1.1 | 32.9% | Coming soon | Coming soon |
| LiveCodeBench v6 | Coming soon | 89.0% | Coming soon |
| SciCode | Coming soon | 44.6% | Coming soon |

### Reasoning

- Winner: Directional only
- Claude Opus 4.8 public-lane score: 62.8 (#25/29)
- Nemotron 3 Ultra public-lane score: 70.8 (#20/29)

| Benchmark | Claude Opus 4.8 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 72.1% | Coming soon | Coming soon |
| ARC-AGI-3 | 1.5% | Coming soon | Coming soon |
| ARC-AGI-1 | 92.50% | Coming soon | Coming soon |
| CritPt | Coming soon | 3.1% | Coming soon |
| LongBench v2 | Coming soon | 61.9% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Claude Opus 4.8 public-lane score: 91.2 (#5/54)
- Nemotron 3 Ultra public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | 66.2% | Coming soon | Coming soon |
| ScreenSpot Pro | 87.9% | Coming soon | Coming soon |
| CharXiv | 89.9% | Coming soon | Coming soon |
| CharXiv w/o tools | 80.5% | Coming soon | Coming soon |

### Knowledge

- Winner: Directional only
- Claude Opus 4.8 public-lane score: 71.8 (Supported · #15/182)
- Nemotron 3 Ultra public-lane score: 50.3 (Estimated · #78/182)

| Benchmark | Claude Opus 4.8 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 93.6% | 87% | Claude Opus 4.8 |
| GPQA-D | 93.6% | 87.0% | Claude Opus 4.8 |
| HLE | 57.9% | 26.7% | Claude Opus 4.8 |
| HLE w/o tools | 49.8% | 26.7% | Claude Opus 4.8 |
| GPQA Diamond (Vals) | 92.4% | 86.1% | Claude Opus 4.8 |
| MMLU-Pro (Vals) | 89.6% | 85.8% | Claude Opus 4.8 |
| MMLU-Pro | Coming soon | 86.8% | Coming soon |

### Multilingual

- Winner: Not comparable
- Claude Opus 4.8 public-lane score: Coming soon
- Nemotron 3 Ultra public-lane score: 89.2 (#7/17)

| Benchmark | Claude Opus 4.8 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| INCLUDE | 87.6% | Coming soon | Coming soon |
| MMLU-ProX | Coming soon | 83% | Coming soon |

### Instruction Following

- Winner: Directional only
- Claude Opus 4.8 public-lane score: 75.4 (#63/146)
- Nemotron 3 Ultra public-lane score: 92.1 (#20/146)

| Benchmark | Claude Opus 4.8 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 81.7% | Coming soon |

### Mathematics

- Winner: Not comparable
- Claude Opus 4.8 public-lane score: 84.4 (#1/12)
- Nemotron 3 Ultra public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| USAMO 2026 | 96.7% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 80.000% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 56.098% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Claude Opus 4.8 or Nemotron 3 Ultra?

Claude Opus 4.8 has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between Claude Opus 4.8 and Nemotron 3 Ultra?

The widest category gap is in coding, where the averages are 60.7 for Claude Opus 4.8 and 21.9 for Nemotron 3 Ultra.

### How many benchmarks does Claude Opus 4.8 cover on BenchLM?

Claude Opus 4.8 currently has 40 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

- [Claude Opus 4.8 vs Claude Opus 5.5](/compare/claude-opus-4-8-vs-claude-opus-5-5)
- [Nemotron 3 Ultra vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-nemotron-3-ultra)
- [Claude Opus 4.8 vs GPT-6.1 Sol](/compare/claude-opus-4-8-vs-gpt-6-1-sol)
- [Nemotron 3 Ultra vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-nemotron-3-ultra)

## Explore More

- [Claude Opus 4.8 profile](/models/claude-opus-4-8)
- [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)