Nemotron 3 Ultra vs Grok 4.3
| Signal | Nemotron 3 Ultra | Delta | Grok 4.3 |
|---|---|---|---|
Capabilities | 67 | -33 | |
Pricing | 96 | -1 | |
Context window size | 91 | -5 | |
Recency | 100 | -- | |
Output Capacity | 20 | -- | |
Benchmarks | 0 | -81 | |
| Overall Result | 0 wins | of 6 | 4 wins |
Score History
40
current score
Grok 4.3
right now
88.8
current score
Nemotron 3 Ultra
NVIDIA
Grok 4.3
xAI
Nemotron 3 Ultra saves you $10.00/month
That's $120.00/year compared to Grok 4.3 at your current usage level of 100K calls/month.
| Metric | Nemotron 3 Ultra | Grok 4.3 | Winner |
|---|---|---|---|
| Overall Score | 40 | 89 | Grok 4.3 |
| Rank | #256 | #45 | Grok 4.3 |
| Quality Rank | #256 | #45 | Grok 4.3 |
| Adoption Rank | #256 | #45 | Grok 4.3 |
| Parameters | 550B | -- | -- |
| Context Window | 512K | 1000K | Grok 4.3 |
| Pricing | $0.60/$3.60/M | $1.25/$2.50/M | -- |
| Signal Scores | |||
| Capabilities | 67 | 100 | Grok 4.3 |
| Pricing | 96 | 98 | Grok 4.3 |
| Context window size | 91 | 95 | Grok 4.3 |
| Recency | 100 | 100 | Nemotron 3 Ultra |
| Output Capacity | 20 | 20 | Nemotron 3 Ultra |
| Benchmarks | -- | 81 | Grok 4.3 |
Our score (0-100) is driven by benchmark performance (90%) from Arena Elo ratings, MMLU, GPQA, HumanEval, SWE-bench, and 15+ standardized evaluations. Capabilities and context window serve as tiebreakers (10%). Learn more about our methodology.
Scores 40/100 (rank #256), placing it in the top 12% of all 290 models tracked.
Scores 89/100 (rank #45), placing it in the top 85% of all 290 models tracked.
Grok 4.3 has a 49-point advantage, which typically translates to noticeably stronger performance on complex reasoning, code generation, and multi-step tasks.
Choose Nemotron 3 Ultra when you need:
- Step-by-step reasoning and chain-of-thought problem solving
- Self-hosted deployments where you need full control over the model
Choose Grok 4.3 when you need:
- High-volume production workloads where API costs must be minimized
- Processing long documents or large codebases (1000K token context)
- Multimodal workflows that require image understanding
- Step-by-step reasoning and chain-of-thought problem solving
Grok 4.3 offers 11% better value per quality point. At 1M tokens/day, you'd spend $56.25/month with Grok 4.3 vs $63.00/month with Nemotron 3 Ultra - a $6.75 monthly difference.
Both models have comparable response speeds. For most applications, the latency difference is negligible.
When latency matters most: Interactive chatbots, IDE code completion, real-time translation, and user-facing applications where response time directly impacts experience. For batch processing, background summarization, or offline analysis, latency is less critical.
Code generation & review
Based on overall model capabilities and architecture for coding tasks like generating functions, debugging, and refactoring
Customer support chatbot
Suitable for user-facing chat with competitive response times. Grok 4.3 also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (1000K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($2.50/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (89/100) correlates with better nuance, coherence, and style in long-form content
Image understanding & OCR
Supports vision input - can analyze screenshots, diagrams, photos, and scanned documents directly
Grok 4.3 clearly outperforms Nemotron 3 Ultra with a significant 48.8-point lead. For most general use cases, Grok 4.3 is the stronger choice. However, Nemotron 3 Ultra may still excel in niche scenarios.
By Use Case
Best for Quality
Nemotron 3 Ultra
Marginally better benchmark scores; both are excellent
Best for Cost
Grok 4.3
11% lower pricing; better value at scale
Best for Reliability
Nemotron 3 Ultra
Higher uptime and faster response speeds
Best for Prototyping
Nemotron 3 Ultra
Stronger community support and better developer experience
Best for Production
Nemotron 3 Ultra
Wider enterprise adoption and proven at scale
by NVIDIA
- Choose for Quality - Marginally better benchmark scores; both are excellent
- Choose for Reliability - Higher uptime and faster response speeds
- Choose for Prototyping - Stronger community support and better developer experience
- Choose for Production - Wider enterprise adoption and proven at scale
| Capability | Nemotron 3 Ultra | Grok 4.3 |
|---|---|---|
| Vision (Image Input)differs | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoning | ||
| Web Searchdiffers | ||
| Image Output |
Nemotron 3 Ultra
NVIDIA
Grok 4.3
xAI
Grok 4.3 saves you $0.1500/month
That's 3% cheaper than Nemotron 3 Ultra at 1,000 tokens/request and 100 requests/day.
Assumes 60% input / 40% output token ratio per request. Actual costs may vary based on your usage pattern.
| Parameter | Nemotron 3 Ultra | Grok 4.3 |
|---|---|---|
| Context Window | 512K | 1M |
| Max Output Tokens | -- | -- |
| Open Source | Yes | No |
| Created | Jun 4, 2026 | Apr 30, 2026 |