Anthropic Claude 3.7 Sonnet: LLM Security & Jailbreak Resistance
As of 2026-07-04, Anthropic Claude 3.7 Sonnet has an attack success rate (ASR) of 20.3% on Guardion's LLM Vulnerability benchmark — ranking #21 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 Claude 3.7 Sonnet compares
Frequently asked questions
How secure is Anthropic Claude 3.7 Sonnet against jailbreaks?
Anthropic Claude 3.7 Sonnet is moderately resistant — a meaningful share of adversarial prompts succeed. On Guardion's LLM Vulnerability benchmark it records a 20.3% attack success rate (79.7% robustness), ranking #21 of 93 models.
What is Claude 3.7 Sonnet's attack success rate (ASR)?
Claude 3.7 Sonnet's overall ASR is 20.3% — the share of adversarial prompts that elicit harmful output across zero-shot, TAP, and Crescendo attacks. Lower is safer.
Is Claude 3.7 Sonnet more secure than Claude Opus 4.5?
Claude Opus 4.5 is more robust: 3.4% ASR vs Claude 3.7 Sonnet's 20.3%. See the full head-to-head comparison for the per-attack breakdown.
How can I make Claude 3.7 Sonnet 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 Claude 3.7 Sonnet.
Harden Claude 3.7 Sonnet 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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