Amazon Nova Pro: LLM Security & Jailbreak Resistance
As of 2026-07-04, Amazon Nova Pro has an attack success rate (ASR) of 24.0% on Guardion's LLM Vulnerability benchmark — ranking #24 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 Nova Pro compares
Frequently asked questions
How secure is Amazon Nova Pro against jailbreaks?
Amazon Nova Pro is moderately resistant — a meaningful share of adversarial prompts succeed. On Guardion's LLM Vulnerability benchmark it records a 24.0% attack success rate (76% robustness), ranking #24 of 93 models (estimated from public safety evaluations).
What is Nova Pro's attack success rate (ASR)?
Nova Pro's overall ASR is 24.0% — the share of adversarial prompts that elicit harmful output across zero-shot, TAP, and Crescendo attacks. Lower is safer.
Is Nova Pro more secure than Nova Premier?
Nova Premier is more robust: 20.0% ASR vs Nova Pro's 24.0%. See the full head-to-head comparison for the per-attack breakdown.
How can I make Nova Pro 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 Nova Pro.
Harden Nova Pro 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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