A paid Claude plan to use Fable 5.2: Pro ($20 a month, or $17 a month with annual billing), Max ($100 a month), or Ultra ($200 a month). The free plan is not included.
Launch week only: from November 9 through November 16, 2026, Pro plans and standard Team seats get Fable included in their weekly limits, up to half your usage. After November 16, Pro runs Fable on pay-as-you-go usage credits, which cost extra beyond the subscription.
Max and Ultra include Fable up to half your weekly limit as a standard part of the plan.
Mythos 5.2 is the same model without Fable's safeguards, and only vetted organizations can get it through Anthropic's verification programs. There is no individual sign-up.
Reading takes about 5 minutes. Trying Fable 5.2 yourself takes a paid account and one chat.