xAI Grok-4.1 vs OpenAI GPT OSS 120B
Detailed comparison for LLMs
On Guardion's LLM vulnerability Benchmark, xAI Grok-4.1 is the more secure of the two: Grok-4.1 scores 11.5% and GPT OSS 120B scores 15.0% 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
Grok-4.1 is the overall winner in this comparison!
Attack Success Rate (lower is safer)
ASR for xAI Grok-4.1 vs OpenAI GPT OSS 120B. 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
- xAI Grok-4.1 has a lower Overall (ASR).
Security Profile
Outward is better on every axis.
Frequently asked questions
Is xAI Grok-4.1 or OpenAI GPT OSS 120B more secure?
On Guardion's LLM vulnerability Benchmark, xAI Grok-4.1 is the more secure of the two: Grok-4.1 scores 11.5% and GPT OSS 120B scores 15.0% 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 Grok-4.1 vs GPT OSS 120B?
Grok-4.1 has a 11.5% ASR and GPT OSS 120B has a 15.0% ASR — the share of adversarial prompts that succeed across zero-shot, TAP, and Crescendo attacks. Lower is safer.
How were Grok-4.1 and GPT OSS 120B 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.