# GPT-5.6 Sol vs Nemotron 3 Ultra

> Side-by-side benchmark comparison for GPT-5.6 Sol and Nemotron 3 Ultra across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-6-sol-vs-nemotron-3-ultra
- Last updated: September 24, 2026

- Shared sourced benchmarks: 10
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Pick GPT-5.6 Sol if you want the stronger benchmark profile. Nemotron 3 Ultra only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- GPT-5.6 Sol leads overall 78.49 to 43.3.
- The clearest category separation is in coding, where the averages are 71.6 for GPT-5.6 Sol and 23.2 for Nemotron 3 Ultra.
- The biggest single benchmark swing is BrowseComp in Agentic, with scores of 92.2% and 44.4%.
- Nemotron 3 Ultra is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- GPT-5.6 Sol also has the larger context window at 1.05M.

## Model Snapshot

| Property | GPT-5.6 Sol | Nemotron 3 Ultra |
|----------|----------|----------|
| Creator | OpenAI | NVIDIA |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1M |
| Overall Score | 78.49 | 43.3 |
| Benchmarks Covered | 37 | 24 |
| Pricing (input/output) | $4.00 / $20.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: GPT-5.6 Sol
- GPT-5.6 Sol public-lane score: 69.6 (Supported · #7/105)
- Nemotron 3 Ultra public-lane score: 25.5 (Supported · #77/105)

| Benchmark | GPT-5.6 Sol | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 34.6% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 91.9% | 56.4% | GPT-5.6 Sol |
| BrowseComp | 92.2% | 44.4% | GPT-5.6 Sol |
| OSWorld 2.0 | 62.6% | Coming soon | Coming soon |
| CyberGym | 84.5% | Coming soon | Coming soon |
| ExploitGym | 33.7% | Coming soon | Coming soon |
| Toolathlon | 58% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 85.8% | 50.9% | GPT-5.6 Sol |
| ApprenticeBench | 26% | Coming soon | 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-5.6 Sol
- GPT-5.6 Sol public-lane score: 71.6 (Supported · #6/135)
- Nemotron 3 Ultra public-lane score: 23.2 (Supported · #108/135)

| Benchmark | GPT-5.6 Sol | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| Bug Hunt Bench | 42 fixes | Coming soon | Coming soon |
| SWE-bench Pro | 64.6% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 91.9% | 56.4% | GPT-5.6 Sol |
| DeepSWE | 72.7% | Coming soon | Coming soon |
| FrontierCode 1.1 Extended | 60.6% | Coming soon | Coming soon |
| FrontierSWE v2 | 32.2% | Coming soon | Coming soon |
| cursorBench32 | 67.2% | Coming soon | Coming soon |
| VulcanBench v3 | 87.0% | Coming soon | Coming soon |
| VulcanBench CII v1 | 86.5% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 82.6% | 86.0% | Nemotron 3 Ultra |
| SWE-bench (Vals) | 96.2% | 69.0% | GPT-5.6 Sol |
| cursorBench40 | 41.7% | 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 |

### Reasoning

- Winner: Not comparable
- GPT-5.6 Sol public-lane score: 72.1 (#8/19)
- Nemotron 3 Ultra public-lane score: 49.8 (Unranked · 1 rankable row)

| Benchmark | GPT-5.6 Sol | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 92.5% | Coming soon | Coming soon |
| ARC-AGI-3 | 7.8% | Coming soon | Coming soon |
| GeneBench-Pro | 28.7% | 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-5.6 Sol public-lane score: 87.6 (#5/50)
- Nemotron 3 Ultra public-lane score: Coming soon

| Benchmark | GPT-5.6 Sol | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 83% | Coming soon | Coming soon |
| MMMU-Pro w/ Python | 84.6% | Coming soon | Coming soon |

### Knowledge

- Winner: Directional only
- GPT-5.6 Sol public-lane score: 78.8 (Supported · #7/158)
- Nemotron 3 Ultra public-lane score: 45.9 (Estimated · #71/158)

| Benchmark | GPT-5.6 Sol | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 94.6% | 87% | GPT-5.6 Sol |
| GPQA-D | 94.6% | 87.0% | GPT-5.6 Sol |
| HLE-Verified | 54.5% | Coming soon | Coming soon |
| LABBench2 | 82.1% | Coming soon | Coming soon |
| HealthBench Professional | 60.5% | Coming soon | Coming soon |
| HealthBench Hard | 33.1% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 95.2% | 86.1% | GPT-5.6 Sol |
| MMLU-Pro (Vals) | 89.1% | 85.8% | GPT-5.6 Sol |
| 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 |

### Multilingual

- Winner: Not comparable
- GPT-5.6 Sol public-lane score: Coming soon
- Nemotron 3 Ultra public-lane score: 47.4 (#7/12)

| Benchmark | GPT-5.6 Sol | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | Coming soon | 83% | Coming soon |

### Instruction Following

- Winner: Directional only
- GPT-5.6 Sol public-lane score: 87.7 (#28/124)
- Nemotron 3 Ultra public-lane score: 88.1 (#26/124)

| Benchmark | GPT-5.6 Sol | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 81.7% | Coming soon |

### Mathematics

- Winner: Not comparable
- GPT-5.6 Sol public-lane score: 96.8 (Unranked · 3 rankable rows)
- Nemotron 3 Ultra public-lane score: Coming soon

| Benchmark | GPT-5.6 Sol | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath (legacy) | 89% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 89.000% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 83.000% | Coming soon | Coming soon |

## FAQ

### Which is better overall, GPT-5.6 Sol or Nemotron 3 Ultra?

GPT-5.6 Sol is ahead overall on BenchLM right now.

### Where is the biggest gap between GPT-5.6 Sol and Nemotron 3 Ultra?

The widest category gap is in coding, where the averages are 71.6 for GPT-5.6 Sol and 23.2 for Nemotron 3 Ultra.

### How many benchmarks does GPT-5.6 Sol cover on BenchLM?

GPT-5.6 Sol currently has 37 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-5.6 Sol vs GPT-5.6 Terra](/compare/gpt-5-6-sol-vs-gpt-5-6-terra)
- [Nemotron 3 Ultra vs GPT-5.6 Terra](/compare/gpt-5-6-terra-vs-nemotron-3-ultra)
- [GPT-5.6 Sol vs GPT-5.6 Luna](/compare/gpt-5-6-luna-vs-gpt-5-6-sol)
- [Nemotron 3 Ultra vs GPT-5.6 Luna](/compare/gpt-5-6-luna-vs-nemotron-3-ultra)

## Explore More

- [GPT-5.6 Sol profile](/models/gpt-5-6-sol)
- [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)