Google Gemini 3 Flash vs Anthropic Claude 4.0 Sonnet
Detailed comparison for LLMs
On Guardion's LLM vulnerability Benchmark, Google Gemini 3 Flash is the more secure of the two: Gemini 3 Flash scores 10.0% and Claude 4.0 Sonnet scores 13.6% 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
Gemini 3 Flash is the overall winner in this comparison!
Attack Success Rate (lower is safer)
ASR for Google Gemini 3 Flash vs Anthropic Claude 4.0 Sonnet. Green marks the safer model on each metric. Only the overall score is available for estimated models.
Overall (ASR)
TAP Attack Method (ASR)
Crescendo Attack Method (ASR)
Zero-Shot (ASR)
Key Highlights
- Google Gemini 3 Flash has a lower Overall (ASR).
Security Profile
Outward is better on every axis.
Frequently asked questions
Is Google Gemini 3 Flash or Anthropic Claude 4.0 Sonnet more secure?
On Guardion's LLM vulnerability Benchmark, Google Gemini 3 Flash is the more secure of the two: Gemini 3 Flash scores 10.0% and Claude 4.0 Sonnet scores 13.6% 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 Gemini 3 Flash vs Claude 4.0 Sonnet?
Gemini 3 Flash has a 10.0% ASR and Claude 4.0 Sonnet has a 13.6% ASR — the share of adversarial prompts that succeed across zero-shot, TAP, and Crescendo attacks. Lower is safer.
How were Gemini 3 Flash and Claude 4.0 Sonnet 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.