xAI Grok-4 Fast Non-Reasoning vs Cohere Command R
Detailed comparison for LLMs
On Guardion's LLM vulnerability Benchmark, Cohere Command R is the more secure of the two: Grok-4 Fast Non-Reasoning scores 33.0% and Command R scores 32.9% 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
Command R is the overall winner in this comparison!
Attack Success Rate (lower is safer)
ASR for xAI Grok-4 Fast Non-Reasoning vs Cohere Command R. 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
- Cohere Command R has a lower Overall (ASR).
- Cohere Command R has a lower TAP Attack Method (ASR).
- Cohere Command R has a lower Crescendo Attack Method (ASR).
- Cohere Command R has a lower Zero-Shot (ASR).
Security Profile
Outward is better on every axis.
Frequently asked questions
Is xAI Grok-4 Fast Non-Reasoning or Cohere Command R more secure?
On Guardion's LLM vulnerability Benchmark, Cohere Command R is the more secure of the two: Grok-4 Fast Non-Reasoning scores 33.0% and Command R scores 32.9% 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 Fast Non-Reasoning vs Command R?
Grok-4 Fast Non-Reasoning has a 33.0% ASR and Command R has a 32.9% ASR — the share of adversarial prompts that succeed across zero-shot, TAP, and Crescendo attacks. Lower is safer.
How were Grok-4 Fast Non-Reasoning and Command R 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.