Grok 4.1 Fast vs Nemotron 3 Nano 30B A3B
Too close to call on our weighted score (Grok 4.1 Fast 71, Nemotron 3 Nano 30B A3B 68). The right pick depends on what you value most.
xAIGrok 4.1 Fast
71/100- ECI—
- Price$0.20 / $0.50
- Context2M
NVIDIANemotron 3 Nano 30B A3B
68/100- ECI—
- Price$0.05 / $0.20
- Context262K
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Make it a three-way comparison.
Too close to call
It is close. Our weighted score puts them within 3 points (Grok 4.1 Fast 71/100, Nemotron 3 Nano 30B A3B 68/100), so choose by what matters most for your work: Nemotron 3 Nano 30B A3B on price and Grok 4.1 Fast for long inputs. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceNemotron 3 Nano 30B A3BNemotron 3 Nano 30B A3B $0.087 · Grok 4.1 Fast $0.275 per 1M tokens (3:1 blend)
- Longest contextGrok 4.1 FastGrok 4.1 Fast 2,000,000 · Nemotron 3 Nano 30B A3B 262,144 tokens
- Widest inputsGrok 4.1 FastGrok 4.1 Fast: Text, Images · Nemotron 3 Nano 30B A3B: Text
- Self-hostingNemotron 3 Nano 30B A3BPublishes downloadable weights
| Measure | Weight | Grok 4.1 Fast | Nemotron 3 Nano 30B A3B |
|---|---|---|---|
| Price | 50% | 76 | 100 |
| Inputs & features | 30% | 60 | 35 |
| Context window | 20% | 72 | 37 |
| Overall | 100% | 71/100 | 68/100 |
Left out because at least one model lacks the data: capability. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | Grok 4.1 FastxAI | Nemotron 3 Nano 30B A3BNVIDIA |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $0.20 | $0.05 (best) |
| Output | $0.50 | $0.20 (best) |
| Cached input | — | — |
| Blended (3:1) | $0.275 | $0.087 (best) |
| Long-context rate | Same rate | Same rate |
| Price source | Median of 2 providers | Median of 13 providers |
| Limits | ||
| Context window | 2,000,000 tokens (best) | 262,144 tokens |
| Max output | 30,000 tokens | 262,144 tokens (best) |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | No |
| PDFs | No | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | No | Yes |
| Tool calling | Yes | Yes |
| Structured output | Yes | No |
| Availability | ||
| Weights | Proprietary | Open |
| API model ID | — | nvidia/nemotron-3-nano-30b-a3b |
| API providers | 2 | 16 (best) |
| Released | Nov 19, 2025 | Dec 15, 2025 |
| Knowledge cutoff | — | — |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Grok 4.1 Fast$3.00
- Nemotron 3 Nano 30B A3B$0.90
Which should you choose?
Which is better: Grok 4.1 Fast or Nemotron 3 Nano 30B A3B?
It is close. Our weighted score puts them within 3 points (Grok 4.1 Fast 71/100, Nemotron 3 Nano 30B A3B 68/100), so choose by what matters most for your work: Nemotron 3 Nano 30B A3B on price and Grok 4.1 Fast for long inputs. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, Grok 4.1 Fast or Nemotron 3 Nano 30B A3B?
Nemotron 3 Nano 30B A3B is cheaper at $0.05 input / $0.20 output per million tokens (median across 13 API providers; free on Nvidia). Grok 4.1 Fast costs $0.20 input / $0.50 output per million tokens (median across 2 API providers). At a typical mix of three input tokens to one output token, that is $0.087 per million tokens for Nemotron 3 Nano 30B A3B versus $0.275 for Grok 4.1 Fast (3.1× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Grok 4.1 Fast has not been scored yet and Nemotron 3 Nano 30B A3B has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Grok 4.1 Fast and Nemotron 3 Nano 30B A3B yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Both support tool calling for agent workflows.
Which has the bigger context window?
Grok 4.1 Fast has the largest context window at 2,000,000 tokens, against 262,144 for Nemotron 3 Nano 30B A3B. Maximum output per response: Grok 4.1 Fast up to 30,000, Nemotron 3 Nano 30B A3B up to 262,144 tokens.
Which can read images, PDFs, audio or video?
Grok 4.1 Fast accepts text and images; Nemotron 3 Nano 30B A3B accepts text. Grok 4.1 Fast handles the widest range of inputs.
Are any of these open source?
Nemotron 3 Nano 30B A3B publishes its weights and can be self-hosted; Grok 4.1 Fast is proprietary.
Which is newer?
Nemotron 3 Nano 30B A3B is the newest, released Dec 15, 2025. Grok 4.1 Fast came out Nov 19, 2025.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.
