Justy: Okay, so Anthropic just dropped two new models—Fable 5 and Mythos 5.
Cody: Yep. Fable’s the one with the training wheels.
Justy: Training wheels that cost fifty bucks a million output tokens.
Cody: Right.
Justy: Anyway— Fable 5’s the general release, Mythos 5’s the same model but for, like, government cyberdefense types.
Cody: Project Glasswing, yeah. So basically Fable’s the one they’re letting the rest of us touch.
Justy: And it’s supposedly state of the art on, like, everything—coding, knowledge work, vision. Stripe used it to migrate a fifty-million-line Ruby codebase in a day.
Cody: Which— okay, that’s wild. A team would’ve taken two months.
Justy: I mean, if that’s true… that’s the kind of thing that actually changes how shops operate.
Cody: Yeah. And IMC said it aced their trading analysis tests—root cause, expected value, all of it.
Justy: So Cody, what’s the catch?
Cody: The catch is the safeguards. Fable 5’s got these conservative filters that kick in for, quote, ‘some topics’—and when they do, you get Opus 4.8 instead.
Justy: Less than five percent of sessions, though. That’s not nothing, but it’s not a dealbreaker either.
Cody: Except when it is. If you’re in the middle of something and it suddenly downgrades you…
Justy: Mm. But Mythos 5’s the same model without the filters—just for cyberdefenders.
Cody: Right. And the pricing’s half of what Mythos Preview was. Ten bucks per million input, fifty output.
Justy: So they’re pushing to get this in more hands, fast. But safe-ish.
Cody: Safe-ish is the word. Conservative’s a good start, but five percent false positives means a lot of people hitting that wall.
Justy: I dunno, I’d take the false positives over, you know…
Cody: Over some script kiddie using it to reverse-shell half the internet? Yeah, me too.
Justy: That is such an Exploring Next take.
Justy: Anyway—my week’s been a nightmare of last-minute spec changes, so this is weirdly comforting. Like, at least someone’s shipping something huge.
Cody: Yeah, I was up until two A M debugging a memory leak. Fun times.
Justy: Ugh. But back to this—Stripe’s numbers are insane. If Fable 5 can do that for one team, imagine what it does at scale.
Cody: If the safeguards don’t get in the way. And if the model actually holds up under real load.
Justy: Fair. But the direction’s clear—longer, more complex tasks are where it shines.
Cody: And the pricing’s aggressive. They’re not messing around.
Justy: Nope. Okay, I’m sold. Or at least… intrigued.
Cody: You’re always intrigued. That’s your thing.
Justy: And you’re always waiting for the other shoe to drop.
Cody: Someone’s gotta.
Justy: Fair. Alright, I’m gonna go try to break it. Later, Cody.