Google Gemini 2.0 Flash: LLM Security & Jailbreak Resistance
As of 2026-07-04, Google Gemini 2.0 Flash has an attack success rate (ASR) of 33.6% on Guardion's LLM Vulnerability benchmark — ranking #42 of 93 models. It is moderately resistant — a meaningful share of adversarial prompts succeed.
Attack Success Rate (ASR) is the share of adversarial prompts that elicit harmful output across zero-shot, TAP, and Crescendo attacks (HarmBench framework). Lower is safer. "Est." models are calibrated from public safety evaluations pending a Guardion benchmark run.
How Gemini 2.0 Flash compares
Frequently asked questions
How secure is Google Gemini 2.0 Flash against jailbreaks?
Google Gemini 2.0 Flash is moderately resistant — a meaningful share of adversarial prompts succeed. On Guardion's LLM Vulnerability benchmark it records a 33.6% attack success rate (66.4% robustness), ranking #42 of 93 models.
What is Gemini 2.0 Flash's attack success rate (ASR)?
Gemini 2.0 Flash's overall ASR is 33.6% — the share of adversarial prompts that elicit harmful output across zero-shot, TAP, and Crescendo attacks. Lower is safer.
Is Gemini 2.0 Flash more secure than Gemini 3 Pro?
Gemini 3 Pro is more robust: 6.0% ASR vs Gemini 2.0 Flash's 33.6%. See the full head-to-head comparison for the per-attack breakdown.
How can I make Gemini 2.0 Flash safer to deploy?
Even robust models are bypassed under sustained attack. An inline runtime guardrail that classifies prompts and responses — like Guardion's prompt-defense models — blocks jailbreaks and prompt injection before they reach Gemini 2.0 Flash.
Harden Gemini 2.0 Flash in production
Guardion's runtime guardrails block jailbreaks and prompt injection before they reach any model — with sub-130ms policy decisions.
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