Llama 3.1 Nemotron 8B UltraLong 4M Instruct vs Llama 3 3 Nemotron Super 49B V1 5
Side-by-side comparison of VRAM requirements, quantization, context length, and hardware compatibility.
Specifications
| Llama 3.1 Nemotron 8B UltraLong 4M Instruct | Llama 3 3 Nemotron Super 49B V1 5 | |
|---|---|---|
| Parameters | 8.0B | 49.9B |
| Context | 4293K | 131K |
| Architecture | LlamaForCausalLM | DeciLMForCausalLM |
| License | CC BY-NC 4.0 | Other |
| Downloads | 404 | 56.5K |
| Released | Apr 2025 | Oct 2025 |
VRAM by Quantization: Llama 3.1 Nemotron 8B UltraLong 4M Instruct vs Llama 3 3 Nemotron Super 49B V1 5
| Quantization | Bits | Llama 3.1 Nemotron 8B UltraLong 4M Instruct VRAM | Llama 3 3 Nemotron Super 49B V1 5 VRAM |
|---|---|---|---|
| BF16 | 16.00 | 16.6 GB | 109.7 GB |
Verdict
Llama 3.1 Nemotron 8B UltraLong 4M Instruct needs less VRAM at BF16 (16.6 GB vs 109.7 GB), so it fits on smaller GPUs. Llama 3.1 Nemotron 8B UltraLong 4M Instruct supports a longer context window (4293K tokens). Llama 3 3 Nemotron Super 49B V1 5 is the more widely downloaded of the two.
Frequently Asked Questions
- Which needs less VRAM, Llama 3.1 Nemotron 8B UltraLong 4M Instruct or Llama 3 3 Nemotron Super 49B V1 5?
At BF16, Llama 3.1 Nemotron 8B UltraLong 4M Instruct needs 16.6 GB and Llama 3 3 Nemotron Super 49B V1 5 needs 109.7 GB, so Llama 3.1 Nemotron 8B UltraLong 4M Instruct is the lighter option to run locally.
- Which has a longer context window, Llama 3.1 Nemotron 8B UltraLong 4M Instruct or Llama 3 3 Nemotron Super 49B V1 5?
Llama 3.1 Nemotron 8B UltraLong 4M Instruct supports 4,292,608 tokens and Llama 3 3 Nemotron Super 49B V1 5 supports 131,072 tokens.
- What is the difference between Llama 3.1 Nemotron 8B UltraLong 4M Instruct and Llama 3 3 Nemotron Super 49B V1 5?
Llama 3.1 Nemotron 8B UltraLong 4M Instruct is a 8.0B model from NVIDIA (Llama 3 family), while Llama 3 3 Nemotron Super 49B V1 5 is a 49.9B model from NVIDIA (Llama 3 family). Compare their VRAM requirements above to see which fits your GPU or Mac.