As part of the ongoing story, a “Mythos-class” Claude model has arrived for the general public. But it’s not the same “too-dangerous-for-you” Mythos you’ve been hearing about, and Claude subscription users will only get a limited crack at it. Yes, it’s finally happened.
As part of the ongoing story, claude Fable 5 is now available in the Claude desktop app, and the fresh model is so powerful that it has “the potential to do profound good for the global stage,” Anthropic said in a press drop.
As part of the ongoing story, that’s why the model arrives with conservative safeguards that may “sometimes catch harmless requests.” (Anthropic pegs the frequency of over-cautious denials at less than 5 percent of sessions.). At the same time, Fable 5’s extreme cybersecurity capabilities “could be misused to cause serious damage,” Anthropic warns.
In a fresh development, anthropic is also releasing Claude Mythos 5, based on the same underlying model as Fable 5 but with safeguards lifted in some areas, for a “small group of cyberdefenders and infrastructure providers.”.
As part of the ongoing story, but the biggest leaps come in cybersecurity, which was what all the fuss was about when news of Claude Mythos first broke. Anthropic has dropped benchmarks for Fable 5 that promise substantial improvements in coding, spatial reasoning, and other areas over previous models.
The report highlights that the good news is that those of us who are subscribers (versus API users who pay by the token) can use Fable 5 right now, and that includes Claude Pro, Max, Team, and seat-based Enterprise users. The bad news? Anthropic will yank Fable 5 from Claude plans on June 23rd. After that, you’ll need paid usage credits to access Fable 5. (Credits are pre-paid and charged at the same rate as API usage.). There’s good news and bad news when it comes to Fable 5 access for paid Claude users.
Industry observers note that anthropic says it “aim[s] to restore Fable 5 as a standard part of subscription plans … as soon as possible” but only “when sufficient capacity allows us to do so.”.
Industry observers note that in the meantime, those on paid Claude plans can kick the tires on Fable 5, but expect your usage meters to drain dramatically faster than they do with Claude Opus 4.8, the next-most-powerful Claude model.
According to the latest update, for my part, I tried using Fable 5 with Claude Code but was almost immediately kicked off, with a vague error message saying there was an “issue with this model.” Hmm.
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