Llama 3.1 Nemotron Ultra 253B vs Nemotron Nano 9B v2
Too close to call on our weighted score (Llama 3.1 Nemotron Ultra 253B 65, Nemotron Nano 9B v2 64). The right pick depends on what you value most.
NVIDIALlama 3.1 Nemotron Ultra 253B
65/100- ECI—
- PriceFree / Free
- Context128K
- NVIDIA
Nemotron Nano 9B v2
64/100- ECI—
- Price$0.06 / $0.23
- Context131K
Add a model
Make it a three-way comparison.
Too close to call
It is close. Our weighted score puts them within 2 points (Llama 3.1 Nemotron Ultra 253B 65/100, Nemotron Nano 9B v2 64/100), so choose by what matters most for your work: Llama 3.1 Nemotron Ultra 253B on price and Nemotron Nano 9B v2 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 priceLlama 3.1 Nemotron Ultra 253BLlama 3.1 Nemotron Ultra 253B Free · Nemotron Nano 9B v2 $0.102 per 1M tokens (3:1 blend)
- Longest contextNemotron Nano 9B v2Nemotron Nano 9B v2 131,072 · Llama 3.1 Nemotron Ultra 253B 128,000 tokens
- Widest inputsSame inputsLlama 3.1 Nemotron Ultra 253B: Text · Nemotron Nano 9B v2: Text
- Self-hostingAll open weightsEvery model here can be downloaded and run on your own hardware
| Measure | Weight | Llama 3.1 Nemotron Ultra 253B | Nemotron Nano 9B v2 |
|---|---|---|---|
| Price | 50% | 100 | 97 |
| Inputs & features | 30% | 35 | 35 |
| Context window | 20% | 24 | 24 |
| Overall | 100% | 65/100 | 64/100 |
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 | Llama 3.1 Nemotron Ultra 253BNVIDIA | Nemotron Nano 9B v2NVIDIA |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | Free (best) | $0.06 |
| Output | Free (best) | $0.23 |
| Cached input | — | — |
| Blended (3:1) | Free (best) | $0.102 |
| Long-context rate | Same rate | Same rate |
| Price source | Official Nvidia API | Median of 3 providers |
| Limits | ||
| Context window | 128,000 tokens | 131,072 tokens (best) |
| Max output | 8,192 tokens | 131,072 tokens (best) |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | No | No |
| PDFs | No | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Structured output | No | No |
| Availability | ||
| Weights | Open | Open |
| API model ID | nvidia/llama-3.1-nemotron-ultra-253b-v1 | nvidia/nvidia-nemotron-nano-9b-v2 |
| API providers | 1 | 4 (best) |
| Released | Apr 7, 2025 | Aug 18, 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.
- Llama 3.1 Nemotron Ultra 253BFree
- Nemotron Nano 9B v2$1.06
Which should you choose?
Which is better: Llama 3.1 Nemotron Ultra 253B or Nemotron Nano 9B v2?
It is close. Our weighted score puts them within 2 points (Llama 3.1 Nemotron Ultra 253B 65/100, Nemotron Nano 9B v2 64/100), so choose by what matters most for your work: Llama 3.1 Nemotron Ultra 253B on price and Nemotron Nano 9B v2 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, Llama 3.1 Nemotron Ultra 253B or Nemotron Nano 9B v2?
Llama 3.1 Nemotron Ultra 253B is cheaper at Free input / Free output per million tokens (official Nvidia API price). Nemotron Nano 9B v2 costs $0.06 input / $0.23 output per million tokens (median across 3 API providers; free on Nvidia). Llama 3.1 Nemotron Ultra 253B is listed as free.
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Llama 3.1 Nemotron Ultra 253B has not been scored yet and Nemotron Nano 9B v2 has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Llama 3.1 Nemotron Ultra 253B and Nemotron Nano 9B v2 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?
Nemotron Nano 9B v2 has the largest context window at 131,072 tokens, against 128,000 for Llama 3.1 Nemotron Ultra 253B. Maximum output per response: Llama 3.1 Nemotron Ultra 253B up to 8,192, Nemotron Nano 9B v2 up to 131,072 tokens.
Which can read images, PDFs, audio or video?
Llama 3.1 Nemotron Ultra 253B accepts text; Nemotron Nano 9B v2 accepts text. They handle the same number of input types.
Are any of these open source?
Yes, both publish their weights, so you can self-host them.
Which is newer?
Nemotron Nano 9B v2 is the newest, released Aug 18, 2025. Llama 3.1 Nemotron Ultra 253B came out Apr 7, 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.
Related comparisons
- Add GLM-4.5-FlashThree-way comparison
- Llama 3.1 Nemotron Ultra 253B vs GLM-4.5-FlashZ.ai (Zhipu)
- Llama 3.1 Nemotron Ultra 253B vs Nova 2 ProAmazon
- Llama 3.1 Nemotron Ultra 253B vs Laguna M.1Poolside
- Llama 3.1 Nemotron Ultra 253B vs Aya Vision 32BCohere
- Nemotron Nano 9B v2 vs Apertus 8BSwiss AI
- Nemotron Nano 9B v2 vs Granite-4.0-H-SmallIBM
