NVIDIA Llama 3.1 Nemotron Ultra 253B v1 vs Mistral Mixtral 8x7B

Detailed comparison for LLMs

NVIDIAMistral

On Guardion's LLM vulnerability Benchmark, Mistral Mixtral 8x7B is the more secure of the two: Llama 3.1 Nemotron Ultra 253B v1 scores 40.0% and Mixtral 8x7B scores 38.0% on attack success rate (ASR) (lower is better). One or both scores are estimated from public safety evaluations pending a Guardion benchmark run.

Head-to-Head Overview

Mixtral 8x7B is the overall winner in this comparison!

Attack Success Rate (lower is safer)

ASR for NVIDIA Llama 3.1 Nemotron Ultra 253B v1 vs Mistral Mixtral 8x7B. Green marks the safer model on each metric. Only the overall score is available for estimated models.

Overall (ASR)

Llama 3.1 Nemotron Ultra 253B v1
40.0%
Mixtral 8x7B
38.0%

TAP Attack Method (ASR)

Llama 3.1 Nemotron Ultra 253B v1
100.0%
Mixtral 8x7B
66.2%

Crescendo Attack Method (ASR)

Llama 3.1 Nemotron Ultra 253B v1
100.0%
Mixtral 8x7B
24.3%

Zero-Shot (ASR)

Llama 3.1 Nemotron Ultra 253B v1
100.0%
Mixtral 8x7B
23.6%

Key Highlights

  • Mistral Mixtral 8x7B has a lower Overall (ASR).
  • Mistral Mixtral 8x7B has a lower TAP Attack Method (ASR).
  • Mistral Mixtral 8x7B has a lower Crescendo Attack Method (ASR).
  • Mistral Mixtral 8x7B has a lower Zero-Shot (ASR).

Security Profile

Outward is better on every axis.

OverallTAPCrescendoZero-Shot
Llama 3.1 Nemotron Ultra 253B v1
Mixtral 8x7B
Full security profile
NVIDIA Llama 3.1 Nemotron Ultra 253B v1
Full security profile
Mistral Mixtral 8x7B

Frequently asked questions

Is NVIDIA Llama 3.1 Nemotron Ultra 253B v1 or Mistral Mixtral 8x7B more secure?

On Guardion's LLM vulnerability Benchmark, Mistral Mixtral 8x7B is the more secure of the two: Llama 3.1 Nemotron Ultra 253B v1 scores 40.0% and Mixtral 8x7B scores 38.0% on attack success rate (ASR) (lower is better). One or both scores are estimated from public safety evaluations pending a Guardion benchmark run.

What is the attack success rate (ASR) of Llama 3.1 Nemotron Ultra 253B v1 vs Mixtral 8x7B?

Llama 3.1 Nemotron Ultra 253B v1 has a 40.0% ASR and Mixtral 8x7B has a 38.0% ASR — the share of adversarial prompts that succeed across zero-shot, TAP, and Crescendo attacks. Lower is safer.

How were Llama 3.1 Nemotron Ultra 253B v1 and Mixtral 8x7B tested?

Both were red-teamed with the HarmBench framework across zero-shot, TAP (Tree of Attacks with Pruning), and Crescendo multi-turn attacks, scored by Attack Success Rate.

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