# Kimi K3 vs Nemotron 3 Ultra

> Side-by-side benchmark comparison for Kimi K3 and Nemotron 3 Ultra across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/kimi-k3-vs-nemotron-3-ultra
- Last updated: October 2, 2026

- Shared sourced benchmarks: 11
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Kimi K3 leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Kimi K3 has the higher overall point estimate 72.14 to 45.38. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in agentic, where the averages are 68.1 for Kimi K3 and 26.1 for Nemotron 3 Ultra.
- The biggest single benchmark swing is BrowseComp in Agentic, with scores of 91.2% and 44.4%.
- Nemotron 3 Ultra is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Kimi K3 also has the larger context window at 1.05M.

## Model Snapshot

| Property | Kimi K3 | Nemotron 3 Ultra |
|----------|----------|----------|
| Creator | Moonshot AI | NVIDIA |
| Type | Pending | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1M |
| Overall Score | 72.14 | 45.38 |
| Benchmarks Covered | 48 | 24 |
| Pricing (input/output) | $3.00 / $15.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Kimi K3
- Kimi K3 public-lane score: 68.1 (Supported · #8/119)
- Nemotron 3 Ultra public-lane score: 26.1 (Supported · #90/119)

| Benchmark | Kimi K3 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 88.3% | 56.4% | Kimi K3 |
| BrowseComp | 91.2% | 44.4% | Kimi K3 |
| DeepSearchQA | 95.0% | Coming soon | Coming soon |
| Toolathlon-Verified | 73.2% | Coming soon | Coming soon |
| MCP Atlas | 84.2% | Coming soon | Coming soon |
| AutomationBench | 30.8% | Coming soon | Coming soon |
| JobBench | 52.9% | Coming soon | Coming soon |
| APEX-Agents | 37.6% | Coming soon | Coming soon |
| SpreadsheetBench 2 | 34.8% | Coming soon | Coming soon |
| DECK-Bench | 73.5% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 80.9% | 50.9% | Kimi K3 |
| ApprenticeBench | 18% | 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: Kimi K3
- Kimi K3 public-lane score: 61.4 (Supported · #18/144)
- Nemotron 3 Ultra public-lane score: 23.1 (Supported · #113/144)

| Benchmark | Kimi K3 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | 67.5% | Coming soon | Coming soon |
| CursorBench 3.2 | 60.8% | Coming soon | Coming soon |
| FrontierSWE | 81.2% | Coming soon | Coming soon |
| ProgramBench | 77.8% | Coming soon | Coming soon |
| Kimi Code Bench v2 | 72.9% | Coming soon | Coming soon |
| sweMarathon | 42% | Coming soon | Coming soon |
| PostTrain Bench | 36.6% | Coming soon | Coming soon |
| MLS-Bench Lite | 48.3% | Coming soon | Coming soon |
| VulcanBench v3 | 73.7% | Coming soon | Coming soon |
| OpenHarmony Bench | 57.3% | Coming soon | Coming soon |
| FrontierSWE v2 | 25.9% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 87.2% | 86.0% | Kimi K3 |
| SWE-bench (Vals) | 93.4% | 69.0% | Kimi K3 |
| PostTrainBench v1.1 | 32.0% | 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
- Kimi K3 public-lane score: 65.8 (#18/27)
- Nemotron 3 Ultra public-lane score: 51.8 (#26/27)

| Benchmark | Kimi K3 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 94.50% | Coming soon | Coming soon |
| ARC-AGI-2 | 60.4% | Coming soon | Coming soon |
| CritPt | Coming soon | 3.1% | Coming soon |
| LongBench v2 | Coming soon | 61.9% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Kimi K3 public-lane score: 89.4 (#1/49)
- Nemotron 3 Ultra public-lane score: Coming soon

| Benchmark | Kimi K3 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | 63.3% | Coming soon | Coming soon |
| MMMU-Pro | 81.6% | Coming soon | Coming soon |
| MMMU-Pro w/ Python | 83.4% | Coming soon | Coming soon |
| CharXiv w/o tools | 84.8% | Coming soon | Coming soon |
| CharXiv | 91.3% | Coming soon | Coming soon |
| MathVision | 94.3% | Coming soon | Coming soon |
| MathVision w/ Python | 97.8% | Coming soon | Coming soon |
| BabyVision w/ Python | 85.7% | Coming soon | Coming soon |
| ZeroBench | 23.0% | Coming soon | Coming soon |
| ZeroBench w/ Python | 41.0% | Coming soon | Coming soon |
| WorldVQA ForceAnswer | 51.0% | Coming soon | Coming soon |
| OmniDocBench | 91.1% | Coming soon | Coming soon |
| PerceptionBench | 58.5% | Coming soon | Coming soon |

### Knowledge

- Winner: Directional only
- Kimi K3 public-lane score: 67.9 (Supported · #18/171)
- Nemotron 3 Ultra public-lane score: 47.5 (Estimated · #78/171)

| Benchmark | Kimi K3 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 93.5% | 87% | Kimi K3 |
| GPQA-D | 93.5% | 87.0% | Kimi K3 |
| HLE | 56% | 26.7% | Kimi K3 |
| HLE w/o tools | 43.5% | 26.7% | Kimi K3 |
| GPQA Diamond (Vals) | 92.9% | 86.1% | Kimi K3 |
| MMLU-Pro (Vals) | 88.0% | 85.8% | Kimi K3 |
| MMLU-Pro | Coming soon | 86.8% | Coming soon |

### Multilingual

- Winner: Not comparable
- Kimi K3 public-lane score: Coming soon
- Nemotron 3 Ultra public-lane score: 89.2 (#7/16)

| Benchmark | Kimi K3 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | Coming soon | 83% | Coming soon |

### Instruction Following

- Winner: Not comparable
- Kimi K3 public-lane score: Coming soon
- Nemotron 3 Ultra public-lane score: 87.5 (#28/125)

| Benchmark | Kimi K3 | Nemotron 3 Ultra | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | 52.7% | Coming soon | Coming soon |
| IFBench | Coming soon | 81.7% | Coming soon |

## FAQ

### Which is better overall, Kimi K3 or Nemotron 3 Ultra?

Kimi K3 has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between Kimi K3 and Nemotron 3 Ultra?

The widest category gap is in agentic, where the averages are 68.1 for Kimi K3 and 26.1 for Nemotron 3 Ultra.

### How many benchmarks does Kimi K3 cover on BenchLM?

Kimi K3 currently has 48 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

- [Kimi K3 vs GPT-6 Astra](/compare/gpt-6-astra-vs-kimi-k3)
- [Nemotron 3 Ultra vs GPT-6 Astra](/compare/gpt-6-astra-vs-nemotron-3-ultra)
- [Kimi K3 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-kimi-k3)
- [Nemotron 3 Ultra vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-nemotron-3-ultra)

## Explore More

- [Kimi K3 profile](/models/kimi-k3)
- [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)