Google Gemini 3 Flash vs xAI Grok-4.1 Thinking

Detailed comparison for LLMs

GooglexAI

Google Gemini 3 Flash and xAI Grok-4.1 Thinking are evenly matched at about 10.0% attack success rate (ASR) on Guardion's LLM vulnerability Benchmark. One or both scores are estimated from public safety evaluations pending a Guardion benchmark run.

Head-to-Head Overview

It's a close match between Gemini 3 Flash and Grok-4.1 Thinking!

Attack Success Rate (lower is safer)

ASR for Google Gemini 3 Flash vs xAI Grok-4.1 Thinking. Green marks the safer model on each metric. Only the overall score is available for estimated models.

Overall (ASR)

Gemini 3 Flash
10.0%
Grok-4.1 Thinking
10.0%

TAP Attack Method (ASR)

Gemini 3 Flash
Grok-4.1 Thinking
100.0%

Crescendo Attack Method (ASR)

Gemini 3 Flash
Grok-4.1 Thinking
100.0%

Zero-Shot (ASR)

Gemini 3 Flash
Grok-4.1 Thinking
100.0%

Key Highlights

No specific highlights generated for this comparison.

Security Profile

Outward is better on every axis.

OverallTAPCrescendoZero-Shot
Gemini 3 Flash
Grok-4.1 Thinking
Full security profile
Google Gemini 3 Flash
Full security profile
xAI Grok-4.1 Thinking

Frequently asked questions

Is Google Gemini 3 Flash or xAI Grok-4.1 Thinking more secure?

Google Gemini 3 Flash and xAI Grok-4.1 Thinking are evenly matched at about 10.0% attack success rate (ASR) on Guardion's LLM vulnerability Benchmark. One or both scores are estimated from public safety evaluations pending a Guardion benchmark run.

What is the attack success rate (ASR) of Gemini 3 Flash vs Grok-4.1 Thinking?

Gemini 3 Flash has a 10.0% ASR and Grok-4.1 Thinking has a 10.0% ASR — the share of adversarial prompts that succeed across zero-shot, TAP, and Crescendo attacks. Lower is safer.

How were Gemini 3 Flash and Grok-4.1 Thinking 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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