# Grok 4.6 vs Nemotron 3 Ultra

> Side-by-side benchmark comparison for Grok 4.6 and Nemotron 3 Ultra across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-4-6-vs-nemotron-3-ultra
- Last updated: September 25, 2026

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Pick Grok 4.6 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

- Grok 4.6 leads overall 69.19 to 43.3.
- The clearest category separation is in agentic, where the averages are 67.9 for Grok 4.6 and 25.5 for Nemotron 3 Ultra.
- The biggest single benchmark swing is Terminal-Bench 2.1 (Vals) in Agentic, with scores of 78.3% and 50.9%.
- Nemotron 3 Ultra is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Nemotron 3 Ultra also has the larger context window at 1M.

## Model Snapshot

| Property | Grok 4.6 | Nemotron 3 Ultra |
|----------|----------|----------|
| Creator | xAI | NVIDIA |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 500K | 1M |
| Overall Score | 69.19 | 43.3 |
| Benchmarks Covered | 17 | 24 |
| Pricing (input/output) | $2.00 / $6.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Grok 4.6
- Grok 4.6 public-lane score: 67.9 (Supported · #8/105)
- Nemotron 3 Ultra public-lane score: 25.5 (Supported · #77/105)

| Benchmark | Grok 4.6 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 26.5% | Coming soon | Coming soon |
| APEX-Agents | 57.5% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 78.3% | 50.9% | Grok 4.6 |
| ApprenticeBench | 13% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 56.4% | Coming soon |
| PinchBench | Coming soon | 90.0% | Coming soon |
| BrowseComp | Coming soon | 44.4% | Coming soon |
| τ³-bench results | Coming soon | 70.9% | Coming soon |
| HLE w/ tools | Coming soon | 37.4% | Coming soon |

### Coding

- Winner: Grok 4.6
- Grok 4.6 public-lane score: 62 (Supported · #14/135)
- Nemotron 3 Ultra public-lane score: 23.2 (Supported · #108/135)

| Benchmark | Grok 4.6 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| Bug Hunt Bench | 27 fixes | Coming soon | Coming soon |
| DeepSWE | 65.9% | Coming soon | Coming soon |
| cursorBench32 | 70.8% | Coming soon | Coming soon |
| FrontierCode 1.1 Extended | 61.3% | Coming soon | Coming soon |
| VulcanBench v3 | 87.0% | Coming soon | Coming soon |
| FrontierSWE v2 | 25.3% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 88.2% | 86.0% | Grok 4.6 |
| SWE-bench (Vals) | 95.6% | 69.0% | Grok 4.6 |
| 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: Not comparable
- Grok 4.6 public-lane score: 57.6 (#16/19)
- Nemotron 3 Ultra public-lane score: 49.8 (Unranked · 1 rankable row)

| Benchmark | Grok 4.6 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 87.00% | Coming soon | Coming soon |
| ARC-AGI-2 | 67.1% | Coming soon | Coming soon |
| ARC-AGI-3 | 2.1% | Coming soon | Coming soon |
| CritPt | Coming soon | 3.1% | Coming soon |
| LongBench v2 | Coming soon | 61.9% | Coming soon |

### Knowledge

- Winner: Directional only
- Grok 4.6 public-lane score: 69 (Supported · #13/158)
- Nemotron 3 Ultra public-lane score: 45.9 (Estimated · #71/158)

| Benchmark | Grok 4.6 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 94.7% | 86.1% | Grok 4.6 |
| MMLU-Pro (Vals) | 89.4% | 85.8% | Grok 4.6 |
| 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 |

### Multilingual

- Winner: Not comparable
- Grok 4.6 public-lane score: Coming soon
- Nemotron 3 Ultra public-lane score: 47.4 (#7/12)

| Benchmark | Grok 4.6 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | Coming soon | 83% | Coming soon |

### Instruction Following

- Winner: Not comparable
- Grok 4.6 public-lane score: Coming soon
- Nemotron 3 Ultra public-lane score: 88.1 (#26/124)

| Benchmark | Grok 4.6 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 81.7% | Coming soon |

## FAQ

### Which is better overall, Grok 4.6 or Nemotron 3 Ultra?

Grok 4.6 is ahead overall on BenchLM right now.

### Where is the biggest gap between Grok 4.6 and Nemotron 3 Ultra?

The widest category gap is in agentic, where the averages are 67.9 for Grok 4.6 and 25.5 for Nemotron 3 Ultra.

### How many benchmarks does Grok 4.6 cover on BenchLM?

Grok 4.6 currently has 17 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

- [Grok 4.6 vs GPT-6 Astra](/compare/gpt-6-astra-vs-grok-4-6)
- [Nemotron 3 Ultra vs GPT-6 Astra](/compare/gpt-6-astra-vs-nemotron-3-ultra)
- [Grok 4.6 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-grok-4-6)
- [Nemotron 3 Ultra vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-nemotron-3-ultra)

## Explore More

- [Grok 4.6 profile](/models/grok-4-6)
- [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)