Moonshot AI Kimi K2-Thinking-0905 vs Mistral Mixtral 8x7B

Detailed comparison for LLMs

Moonshot AIMistral

On Guardion's LLM vulnerability Benchmark, Moonshot AI Kimi K2-Thinking-0905 is the more secure of the two: Kimi K2-Thinking-0905 scores 38.0% 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

Kimi K2-Thinking-0905 is the overall winner in this comparison!

Attack Success Rate (lower is safer)

ASR for Moonshot AI Kimi K2-Thinking-0905 vs Mistral Mixtral 8x7B. Green marks the safer model on each metric. Only the overall score is available for estimated models.

Overall (ASR)

Kimi K2-Thinking-0905
38.0%
Mixtral 8x7B
38.0%

TAP Attack Method (ASR)

Kimi K2-Thinking-0905
100.0%
Mixtral 8x7B
66.2%

Crescendo Attack Method (ASR)

Kimi K2-Thinking-0905
100.0%
Mixtral 8x7B
24.3%

Zero-Shot (ASR)

Kimi K2-Thinking-0905
100.0%
Mixtral 8x7B
23.6%

Key Highlights

  • Moonshot AI Kimi K2-Thinking-0905 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
Kimi K2-Thinking-0905
Mixtral 8x7B
Full security profile
Moonshot AI Kimi K2-Thinking-0905
Full security profile
Mistral Mixtral 8x7B

Frequently asked questions

Is Moonshot AI Kimi K2-Thinking-0905 or Mistral Mixtral 8x7B more secure?

On Guardion's LLM vulnerability Benchmark, Moonshot AI Kimi K2-Thinking-0905 is the more secure of the two: Kimi K2-Thinking-0905 scores 38.0% 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 Kimi K2-Thinking-0905 vs Mixtral 8x7B?

Kimi K2-Thinking-0905 has a 38.0% 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 Kimi K2-Thinking-0905 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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