Grok 4.3 vs Nemotron 3 Content Safety
Grok 4.3 (2026) and Nemotron 3 Content Safety (2026) are frontier reasoning models from xAI and NVIDIA AI. Grok 4.3 ships a 1M-token context window, while Nemotron 3 Content Safety ships a 131K-token context window. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit. It focuses on practical selection signals rather than broad model-family marketing. The goal is to make the tradeoff clear before deeper testing.
Grok 4.3 fits 8x more tokens; pick it for long-context work and Nemotron 3 Content Safety for tighter calls.
Decision scorecard
Local evidence first| Signal | Grok 4.3 | Nemotron 3 Content Safety |
|---|---|---|
| Decision fit | RAG, Agents, and Long context | Long context, Vision, and Classification |
| Context window | 1M | 131K |
| Cheapest output | $2.5/1M tokens | - |
| Provider routes | 2 tracked | 0 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Grok 4.3 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Grok 4.3 has broader tracked provider coverage for fallback and procurement flexibility.
- Grok 4.3 uniquely exposes Reasoning, Function calling, and Tool use in local model data.
- Local decision data tags Grok 4.3 for RAG, Agents, and Long context.
- Local decision data tags Nemotron 3 Content Safety for Long context, Vision, and Classification.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output prices on this page.
Grok 4.3
$1,625
Cheapest tracked route: xAI Console
Nemotron 3 Content Safety
Unavailable
No complete token price in local provider data
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- No overlapping tracked provider route is sourced for Grok 4.3 and Nemotron 3 Content Safety; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Reasoning, Function calling, and Tool use before moving production traffic.
- No overlapping tracked provider route is sourced for Nemotron 3 Content Safety and Grok 4.3; plan for SDK, billing, or endpoint changes.
- Grok 4.3 adds Reasoning, Function calling, and Tool use in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-05-05 | 2026-03-20 |
| Context window | 1M | 131K |
| Parameters | ~0.5T | 4B |
| Architecture | - | decoder only |
| License | Proprietary | Apache 2.0 |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Grok 4.3 | Nemotron 3 Content Safety |
|---|---|---|
| Input price | $1.25/1M tokens | - |
| Output price | $2.5/1M tokens | - |
| Providers | - |
Capabilities
| Capability | Grok 4.3 | Nemotron 3 Content Safety |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | Yes | No |
| Function calling | Yes | No |
| Tool use | Yes | No |
| Structured outputs | Yes | No |
| Code execution | No | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on reasoning mode: Grok 4.3, function calling: Grok 4.3, tool use: Grok 4.3, and structured outputs: Grok 4.3. Both models share vision and multimodal input, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
Pricing coverage is uneven: Grok 4.3 has $1.25/1M input tokens and Nemotron 3 Content Safety has no token price sourced yet. Provider availability is 2 tracked routes versus 0. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Grok 4.3 when reasoning depth, larger context windows, and broader provider choice are central to the workload. Choose Nemotron 3 Content Safety when vision-heavy evaluation are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions. It also helps separate model capability from provider packaging, which can change cost and latency.
FAQ
Which has a larger context window, Grok 4.3 or Nemotron 3 Content Safety?
Grok 4.3 supports 1M tokens, while Nemotron 3 Content Safety supports 131K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Is Grok 4.3 or Nemotron 3 Content Safety open source?
Grok 4.3 is listed under Proprietary. Nemotron 3 Content Safety is listed under Apache 2.0. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for vision, Grok 4.3 or Nemotron 3 Content Safety?
Both Grok 4.3 and Nemotron 3 Content Safety expose vision. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Which is better for multimodal input, Grok 4.3 or Nemotron 3 Content Safety?
Both Grok 4.3 and Nemotron 3 Content Safety expose multimodal input. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Which is better for reasoning mode, Grok 4.3 or Nemotron 3 Content Safety?
Grok 4.3 has the clearer documented reasoning mode signal in this comparison. If reasoning mode is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Grok 4.3 and Nemotron 3 Content Safety?
Grok 4.3 is available on xAI Console and OpenRouter. Nemotron 3 Content Safety is available on the tracked providers still being sourced. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-05-14. Data sourced from public model cards and provider documentation.