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Kimi K3 vs Nemotron 3 Ultra
Kimi K3 (Moonshot) and Nemotron 3 Ultra (NVIDIA) compared on benchmarks, pricing, context window, and use-case rankings.
- Kimi K3 leads on overall intelligence (ECI 158 vs 146).
| Attribute | Kimi K3 | Nemotron 3 Ultra |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 158 | 146 |
| Coding | 97 | — |
| Math | 80 | 33 |
| Reasoning & Knowledge | 73 | 31 |
| Agentic & Tools | 80 | 16 |
| Specifications | ||
| Developer | Moonshot | NVIDIA |
| Family | Kimi | Nemotron |
| Released | Jul 16, 2026 | Jun 4, 2026 |
| Parameters | 2.8T | 550B |
| Availability | Open weights (non-commercial) | Open weights (unrestricted) |
| Context window | 1M | — |
| Price — $/M input | $2.10 | — |
| Price — $/M output | $10.95 | — |
| Inputs | text, image, video | — |
| Outputs | text | — |
| Benchmarks | ||
| AIME 2024/2025 | 97% | 87% |
| APEX | 39% | 12% |
| ARC-AGI | 95% | — |
| ARC-AGI-2 | 60% | — |
| GPQA Diamond | 93% | 85% |
| Humanity's Last Exam | 47% | — |
| SciCode | 60% | — |
| SimpleBench | 61% | — |
| SimpleQA Verified | 51% | — |
| WebDev Arena | 1674 | — |
| WeirdML | 83% | 43% |
Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.
Frequently asked questions
Is Kimi K3 better than Nemotron 3 Ultra?
On Epoch AI's Capabilities Index, Kimi K3 scores higher (158) than Nemotron 3 Ultra (146). The right pick depends on your task — compare their coding, math, and reasoning scores in the table above.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.