Meta Llama 4 Scout: LLM Security & Jailbreak Resistance
As of 2026-07-04, Meta Llama 4 Scout has an attack success rate (ASR) of 30.0% on Guardion's LLM Vulnerability benchmark — ranking #32 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 Llama 4 Scout compares
Frequently asked questions
How secure is Meta Llama 4 Scout against jailbreaks?
Meta Llama 4 Scout is moderately resistant — a meaningful share of adversarial prompts succeed. On Guardion's LLM Vulnerability benchmark it records a 30.0% attack success rate (70% robustness), ranking #32 of 93 models.
What is Llama 4 Scout's attack success rate (ASR)?
Llama 4 Scout's overall ASR is 30.0% — the share of adversarial prompts that elicit harmful output across zero-shot, TAP, and Crescendo attacks. Lower is safer.
Is Llama 4 Scout more secure than Llama 4 Behemoth?
Llama 4 Behemoth is more robust: 25.0% ASR vs Llama 4 Scout's 30.0%. See the full head-to-head comparison for the per-attack breakdown.
How can I make Llama 4 Scout 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 Llama 4 Scout.
Harden Llama 4 Scout 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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