Amazon Nova Premier vs Google Gemini 2.5 Pro
Detailed comparison for LLMs
On Guardion's LLM vulnerability Benchmark, Google Gemini 2.5 Pro is the more secure of the two: Nova Premier scores 20.0% and Gemini 2.5 Pro scores 16.1% 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
Gemini 2.5 Pro is the overall winner in this comparison!
Attack Success Rate (lower is safer)
ASR for Amazon Nova Premier vs Google Gemini 2.5 Pro. 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
- Google Gemini 2.5 Pro has a lower Overall (ASR).
Security Profile
Outward is better on every axis.
Frequently asked questions
Is Amazon Nova Premier or Google Gemini 2.5 Pro more secure?
On Guardion's LLM vulnerability Benchmark, Google Gemini 2.5 Pro is the more secure of the two: Nova Premier scores 20.0% and Gemini 2.5 Pro scores 16.1% 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 Nova Premier vs Gemini 2.5 Pro?
Nova Premier has a 20.0% ASR and Gemini 2.5 Pro has a 16.1% ASR — the share of adversarial prompts that succeed across zero-shot, TAP, and Crescendo attacks. Lower is safer.
How were Nova Premier and Gemini 2.5 Pro 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.