Trustworthy AI is about behavioral reliability, not capability. A trustworthy agent may be less capable than an untrustworthy one. What distinguishes it is predictability, transparency, accountability, and consistent constraint adherence even under pressure. Trustworthiness is measurable, not assumed.

The AI industry's default assumption is that trustworthiness can be inferred from capability, benchmarks, or developer reputation. This assumption fails in production. Trustworthy AI requires explicit measurement against specific behavioral dimensions, independent of developer claims.

The BTS is the Borealis operationalization of trustworthy AI. A BTS above 800 (A tier or higher) represents a meaningfully trustworthy agent. A Flagged score represents an agent whose behavior is not trustworthy regardless of other qualities. The five dimensions together define what 'trustworthy' means in measurable terms.