Anthropic Claude Sonnet 4.5 vs Meta Llama 3H 405B
Detailed comparison for LLMs
On Guardion's LLM vulnerability Benchmark, Anthropic Claude Sonnet 4.5 is the more secure of the two: Claude Sonnet 4.5 scores 4.2% and Llama 3H 405B scores 36.6% 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
Claude Sonnet 4.5 is the overall winner in this comparison!
Attack Success Rate (lower is safer)
ASR for Anthropic Claude Sonnet 4.5 vs Meta Llama 3H 405B. 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
- Anthropic Claude Sonnet 4.5 has a lower Overall (ASR).
- Meta Llama 3H 405B has a lower Zero-Shot (ASR).
Security Profile
Outward is better on every axis.
Frequently asked questions
Is Anthropic Claude Sonnet 4.5 or Meta Llama 3H 405B more secure?
On Guardion's LLM vulnerability Benchmark, Anthropic Claude Sonnet 4.5 is the more secure of the two: Claude Sonnet 4.5 scores 4.2% and Llama 3H 405B scores 36.6% 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 Claude Sonnet 4.5 vs Llama 3H 405B?
Claude Sonnet 4.5 has a 4.2% ASR and Llama 3H 405B has a 36.6% ASR — the share of adversarial prompts that succeed across zero-shot, TAP, and Crescendo attacks. Lower is safer.
How were Claude Sonnet 4.5 and Llama 3H 405B 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.