What changed
Guidelight AI Standards assessed Anthropic, Google, Meta, OpenAI, and xAI against six public control practices: logging, monitor efficacy, gated actions, circuit breaking, third-party review, and containment planning. No company scored above substantial partial implementation on any practice; Anthropic and OpenAI received the highest overall grades at C+.
Why it matters
The assessment turns broad safety promises into auditable operating controls that procurement, assurance, and model-development teams can map to evidence instead of treating a company-level grade as a deployment guarantee.
What to do
Apply the six-practice rubric to one internal agent system, link every claimed control to configuration and test evidence, record missing or undisclosed controls, and assign remediation owners and retest dates.
Caveat
This is an 18 August catch-up, not 19 August news. Scores use public information and Guidelight's methodology; undisclosed internal controls may be missed, while company grades do not establish safety for any specific model or deployment.