# GPT-5.5 vs Nemotron 3 Ultra

> Side-by-side benchmark comparison for GPT-5.5 and Nemotron 3 Ultra across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-5-vs-nemotron-3-ultra
- Last updated: October 15, 2026

- Shared sourced benchmarks: 10
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

GPT-5.5 leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- GPT-5.5 has the higher overall point estimate 69.34 to 47.12. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in coding, where the averages are 62.1 for GPT-5.5 and 21.9 for Nemotron 3 Ultra.
- The biggest single benchmark swing is BrowseComp in Agentic, with scores of 84.4% 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 | GPT-5.5 | Nemotron 3 Ultra |
|----------|----------|----------|
| Creator | OpenAI | NVIDIA |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | 69.34 | 47.12 |
| Benchmarks Covered | 41 | 24 |
| Pricing (input/output) | $5.00 / $30.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: GPT-5.5
- GPT-5.5 public-lane score: 62.8 (Supported · #22/126)
- Nemotron 3 Ultra public-lane score: 28 (Supported · #95/126)

| Benchmark | GPT-5.5 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 82% | Coming soon | Coming soon |
| CyberGym | 81.8% | Coming soon | Coming soon |
| BrowseComp | 84.4% | 44.4% | GPT-5.5 |
| OSWorld-Verified | 78.7% | Coming soon | Coming soon |
| MCP Atlas | 75.3% | Coming soon | Coming soon |
| Toolathlon | 55.6% | Coming soon | Coming soon |
| τ²-bench results | 98% | Coming soon | Coming soon |
| Gert Labs | 72.93% | Coming soon | Coming soon |
| ResearchClawBench | 17.0% | Coming soon | Coming soon |
| OSWorld 2.0 | 13.0% | Coming soon | Coming soon |
| JobBench | 42.7% | Coming soon | Coming soon |
| ExploitGym | 13.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 76.4% | 50.9% | GPT-5.5 |
| ApprenticeBench | 20% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 56.4% | Coming soon |
| 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: GPT-5.5
- GPT-5.5 public-lane score: 62.1 (Supported · #14/149)
- Nemotron 3 Ultra public-lane score: 21.9 (Supported · #115/149)

| Benchmark | GPT-5.5 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 58.6% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 82.0% | Coming soon | Coming soon |
| Vibe Code Bench | 69.85% | Coming soon | Coming soon |
| React Native Evals | 84.7% | Coming soon | Coming soon |
| cursorBench31 | 59.2% | Coming soon | Coming soon |
| CursorBench 3.2 | 58.4% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 43.0% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 85.3% | 86.0% | Nemotron 3 Ultra |
| SWE-bench (Vals) | 82.6% | 69.0% | GPT-5.5 |
| PostTrainBench v1.1 | 27.2% | 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 |
| Terminal-Bench 2.1 | Coming soon | 56.4% | Coming soon |

### Reasoning

- Winner: Directional only
- GPT-5.5 public-lane score: 70.4 (#21/29)
- Nemotron 3 Ultra public-lane score: 70.8 (#20/29)

| Benchmark | GPT-5.5 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| MRCR v2 64K-128K | 83.1% | Coming soon | Coming soon |
| MRCR v2 128K-256K | 87.5% | Coming soon | Coming soon |
| ARC-AGI-2 | 85% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.4% | Coming soon | Coming soon |
| ARC-AGI-1 | 95.00% | Coming soon | Coming soon |
| CritPt | Coming soon | 3.1% | Coming soon |
| LongBench v2 | Coming soon | 61.9% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- GPT-5.5 public-lane score: 75.5 (#23/54)
- Nemotron 3 Ultra public-lane score: Coming soon

| Benchmark | GPT-5.5 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 81.2% | Coming soon | Coming soon |
| MMMU-Pro w/ Python | 83.2% | Coming soon | Coming soon |
| OfficeQA Pro | 54.1% | Coming soon | Coming soon |

### Knowledge

- Winner: Directional only
- GPT-5.5 public-lane score: 71.9 (Supported · #14/182)
- Nemotron 3 Ultra public-lane score: 50.3 (Estimated · #78/182)

| Benchmark | GPT-5.5 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 93.6% | 87% | GPT-5.5 |
| GPQA-D | 93.6% | 87.0% | GPT-5.5 |
| HLE | 52.2% | 26.7% | GPT-5.5 |
| HLE w/o tools | 41.4% | 26.7% | GPT-5.5 |
| GPQA Diamond (Vals) | 93.2% | 86.1% | GPT-5.5 |
| MMLU-Pro (Vals) | 88.1% | 85.8% | GPT-5.5 |
| MMLU-Pro | Coming soon | 86.8% | Coming soon |

### Multilingual

- Winner: Not comparable
- GPT-5.5 public-lane score: Coming soon
- Nemotron 3 Ultra public-lane score: 89.2 (#7/17)

| Benchmark | GPT-5.5 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | Coming soon | 83% | Coming soon |

### Instruction Following

- Winner: Directional only
- GPT-5.5 public-lane score: 93.3 (#8/146)
- Nemotron 3 Ultra public-lane score: 92.1 (#20/146)

| Benchmark | GPT-5.5 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 81.7% | Coming soon |

### Mathematics

- Winner: Not comparable
- GPT-5.5 public-lane score: 91.2 (Unranked · 3 rankable rows)
- Nemotron 3 Ultra public-lane score: Coming soon

| Benchmark | GPT-5.5 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath (legacy) | 51.7% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 85.263% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 72.500% | Coming soon | Coming soon |

## FAQ

### Which is better overall, GPT-5.5 or Nemotron 3 Ultra?

GPT-5.5 has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between GPT-5.5 and Nemotron 3 Ultra?

The widest category gap is in coding, where the averages are 62.1 for GPT-5.5 and 21.9 for Nemotron 3 Ultra.

### How many benchmarks does GPT-5.5 cover on BenchLM?

GPT-5.5 currently has 41 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

- [GPT-5.5 vs GPT-5.5 Pro](/compare/gpt-5-5-vs-gpt-5-5-pro)
- [Nemotron 3 Ultra vs GPT-5.5 Pro](/compare/gpt-5-5-pro-vs-nemotron-3-ultra)
- [GPT-5.5 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-gpt-5-5)
- [Nemotron 3 Ultra vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-nemotron-3-ultra)

## Explore More

- [GPT-5.5 profile](/models/gpt-5-5)
- [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)