AI model comparison
Kimi K3 vs Nemotron 3 Ultra
Side by side comparison of Kimi K3 and Nemotron 3 Ultra on pricing, benchmark scores, context window, and more.
Kimi K3 is a 2.8T parameter open-weight multimodal reasoning model from Moonshot AI.
- Input / 1M
- $0.19
- Output / 1M
- $16
- Context
- 1.05M
NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model from NVIDIA, with 55B active parameters out of 550B total (MoE).
- Input / 1M
- $0.60
- Output / 1M
- $2.40
- Context
- 262K
Comparing image generators? Compare image models
At a glance
Quick verdict
How the two models stack up on the things people ask about most.
Lower price
Nemotron 3 Ultra
3.5x cheaper for a typical chat
Higher intelligence score
Kimi K3
17.4 vs 11.8 on Artificial Analysis
Larger context window
Kimi K3
1.05M vs 262K tokens
Newer release
Kimi K3
Released July 16, 2026
Benchmarks
Benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
Coding index
Agentic index
Pricing
Kimi K3 vs Nemotron 3 Ultra API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | ||
|---|---|---|
| Input tokensPer 1M tokens | $0.19 | $0.60 |
| Output tokensPer 1M tokens | $16 | $2.40 |
| Cached input (read)Per 1M tokens | $0.18 | $0.12 |
| Cache writePer 1M tokens | Not available | Not available |
What it costs in practice
Estimated cost per 1,000 requests at standard rates. Coding and long-document figures also show the cost when the input is already cached.
Chat message
2K in, 500 out
Coding task
30K in, 4K out
Long document summary
150K in, 2K out
Specs
Context window and capabilities
How much each model can read, how much it can write, and what it accepts as input.
| Metric | ||
|---|---|---|
| Context window | 1.05M tokens | 262K tokens |
| Max output | 944K tokens | 183K tokens |
| Input types | Image, Text, Video | Text |
| Output types | Text | Text |
| Reasoning effort levels | Max, High, Low, None | High, Medium, None |
| Default reasoning effort | Max | High |
| Release date | July 16, 2026 | June 4, 2026 |
Features
Supported features
API features available for each model.
| Metric | ||
|---|---|---|
| Tool calling | Supported | Supported |
| Structured outputs | Supported | Supported |
| JSON mode | Supported | Supported |
| Reasoning | Supported | Supported |
| Temperature | Supported | Supported |
| Stop sequences | Supported | Supported |
| Deterministic seed | Supported | Supported |
| Verbosity control | Not supported | Not supported |
Keep exploring
More on these models
Other head-to-heads, the full model page, and the alternatives list for each model.
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- Kimi K3 vs Claude Sonnet 4.5
- Kimi K3 vs Claude Opus 4.8
- Nemotron 3 Ultra vs Qwen3.8 27B
- Nemotron 3 Ultra vs MiniMax M3
- Nemotron 3 Ultra vs Beam 1.0 501B A23B
- Nemotron 3 Ultra vs Nemotron 3.5 Super VL
- Nemotron 3 Ultra vs Inkling Small
- Nemotron 3 Ultra vs Inkling
- Nemotron 3 Ultra vs Gemini 3.5 Flash Lite
- Nemotron 3 Ultra vs Muse Glimmer 30B
- Nemotron 3 Ultra vs Gemini 3.1 Flash Lite
- Nemotron 3 Ultra vs Command A+
Our take
Nemotron 3 Ultra is 3.5x cheaper for a typical chat. Kimi K3 scores higher on the Artificial Analysis Intelligence Index (17.4 vs 11.8). Kimi K3 has the larger context window (1.05M vs 262K tokens). The right pick depends on your workload, so the quickest way to settle it is to send the same prompt to both and compare.
FAQ
Frequently asked questions
Is Kimi K3 or Nemotron 3 Ultra cheaper?
Nemotron 3 Ultra is cheaper for a typical chat (2K input tokens and 500 output tokens). Nemotron 3 Ultra costs $0.60 per 1M input tokens and $2.40 per 1M output tokens, while Kimi K3 costs $0.19 per 1M input tokens and $16 per 1M output tokens.
Which has a bigger context window, Kimi K3 or Nemotron 3 Ultra?
Kimi K3 supports up to 1.05M tokens of context, compared with 262K for Nemotron 3 Ultra.
Is Kimi K3 smarter than Nemotron 3 Ultra?
On the Artificial Analysis Intelligence Index, Kimi K3 scores 17.4 and Nemotron 3 Ultra scores 11.8, putting Kimi K3 ahead. Benchmarks don't capture everything, so the best test is running your own prompts through both.
Can I use Kimi K3 and Nemotron 3 Ultra at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see Kimi K3 and Nemotron 3 Ultra answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to Kimi K3 and Nemotron 3 Ultra at the same time. Compare the answers side by side and keep the best one.