Grok Code Fast 1 vs Nemotron 3 Super-120B-A12B
Grok Code Fast 1 (2025) and Nemotron 3 Super-120B-A12B (2026) are agentic coding models from xAI and NVIDIA AI. Grok Code Fast 1 ships a 262K-token context window, while Nemotron 3 Super-120B-A12B ships a 1M-token context window. On pricing, Nemotron 3 Super-120B-A12B costs $0.09/1M input tokens versus $0.2/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit.
Nemotron 3 Super-120B-A12B is ~122% cheaper at $0.09/1M; pay for Grok Code Fast 1 only for coding workflow support.
Decision scorecard
Local evidence first| Signal | Grok Code Fast 1 | Nemotron 3 Super-120B-A12B |
|---|---|---|
| Decision fit | Coding, RAG, and Agents | RAG, Long context, and Classification |
| Context window | 262K | 1M |
| Cheapest output | $1.5/1M tokens | $0.45/1M tokens |
| Provider routes | 1 tracked | 3 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Grok Code Fast 1 uniquely exposes Function calling and Tool use in local model data.
- Local decision data tags Grok Code Fast 1 for Coding, RAG, and Agents.
- Nemotron 3 Super-120B-A12B has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Nemotron 3 Super-120B-A12B has the lower cheapest tracked output price at $0.45/1M tokens.
- Nemotron 3 Super-120B-A12B has broader tracked provider coverage for fallback and procurement flexibility.
- Local decision data tags Nemotron 3 Super-120B-A12B for RAG, Long context, and Classification.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output prices on this page.
Grok Code Fast 1
$535
Cheapest tracked route: OpenRouter
Nemotron 3 Super-120B-A12B
$185
Cheapest tracked route: OpenRouter
Estimated monthly gap: $351. Batch, cache, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Nemotron 3 Super-120B-A12B is $1.05/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Function calling and Tool use before moving production traffic.
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Grok Code Fast 1 is $1.05/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Grok Code Fast 1 adds Function calling and Tool use in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-08-27 | 2026-03-11 |
| Context window | 262K | 1M |
| Parameters | 314B | 120B |
| Architecture | mixture of experts | decoder only |
| License | Proprietary | Unknown |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Grok Code Fast 1 | Nemotron 3 Super-120B-A12B |
|---|---|---|
| Input price | $0.2/1M tokens | $0.09/1M tokens |
| Output price | $1.5/1M tokens | $0.45/1M tokens |
| Providers |
Capabilities
| Capability | Grok Code Fast 1 | Nemotron 3 Super-120B-A12B |
|---|---|---|
| Vision | No | No |
| Multimodal | No | No |
| Reasoning | No | No |
| Function calling | Yes | No |
| Tool use | Yes | No |
| Structured outputs | Yes | Yes |
| Code execution | No | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on function calling: Grok Code Fast 1 and tool use: Grok Code Fast 1. Both models share structured outputs, 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.
For cost, Grok Code Fast 1 lists $0.2/1M input and $1.5/1M output tokens, while Nemotron 3 Super-120B-A12B lists $0.09/1M input and $0.45/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Nemotron 3 Super-120B-A12B lower by about $0.39 per million blended tokens. Availability is 1 providers versus 3, so concentration risk also matters.
Choose Grok Code Fast 1 when coding workflow support are central to the workload. Choose Nemotron 3 Super-120B-A12B when long-context analysis, larger context windows, and lower input-token cost 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 Code Fast 1 or Nemotron 3 Super-120B-A12B?
Nemotron 3 Super-120B-A12B supports 1M tokens, while Grok Code Fast 1 supports 262K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Grok Code Fast 1 or Nemotron 3 Super-120B-A12B?
Nemotron 3 Super-120B-A12B is cheaper on tracked token pricing. Grok Code Fast 1 costs $0.2/1M input and $1.5/1M output tokens. Nemotron 3 Super-120B-A12B costs $0.09/1M input and $0.45/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Grok Code Fast 1 or Nemotron 3 Super-120B-A12B open source?
Grok Code Fast 1 is listed under Proprietary. Nemotron 3 Super-120B-A12B is listed under Unknown. 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 function calling, Grok Code Fast 1 or Nemotron 3 Super-120B-A12B?
Grok Code Fast 1 has the clearer documented function calling signal in this comparison. If function calling is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for tool use, Grok Code Fast 1 or Nemotron 3 Super-120B-A12B?
Grok Code Fast 1 has the clearer documented tool use signal in this comparison. If tool use is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Grok Code Fast 1 and Nemotron 3 Super-120B-A12B?
Grok Code Fast 1 is available on OpenRouter. Nemotron 3 Super-120B-A12B is available on DeepInfra, NVIDIA NIM, and OpenRouter. 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.