My thinking is that if there would be more money in releasing Mythos and Cyber than there is in just scary unverifiable (or verified using very favorable context - Mythos) propaganda, they would. These aren't people that go for second best or care about the state of the world.
I've never seen this explicitly stated, but I assume they also want to show due diligence in case their models are used to write successful exploits that lead to major cyberattacks. Given the current WH's ire towards Anthropic, I could see the current DOJ trying to file criminal charges for aiding/abetting/export-violations/etc.
Make it sound "scary good", tell everyone and their mom, charge gullible companies $$$$$ for its premium access and then move on.
they are already getting paid for opus 4.7, why would they release mythos?
assuming mythos is a paper tiger: great marketing, keep going
assuming mythos is for real: err, does this have to be explained?
> These aren't people that go for second best or care about the state of the world
My suspicion is an adult in the room realised that simultaneously pissing off every major corporation, government and NGO, and giving them an incentive to bottle you up immediately, could backfire massively.
That an inference for Mythos is probably beyond what Anthropic can provide at scale right now.