Access policy defines today's AI market more clearly than raw model scores. Anthropic exposed Mythos-class capability through a routed public model, the EU reopened WhatsApp distribution to rival assistants, and N-day experiments showed that published patches can become working exploits within hours.
1. Claude Fable 5 brings Mythos-class capability to public access
Anthropic released Claude Fable 5, built on the same underlying model as Mythos 5, through Claude subscriptions, its API, and cloud marketplaces. API pricing is $10 per million input tokens and $50 per million output tokens, with a 30-day retention requirement for safety monitoring.
Flagged cybersecurity, biology, and chemistry requests are refused or routed to earlier Claude models, while vetted partners receive broader Mythos access. Model identity therefore includes classifiers, fallback policy, retention, and account status alongside the advertised checkpoint.
Sources: Anthropic's Fable 5 and Mythos 5 announcement · TechCrunch on Fable's access and pricing
2. EU orders Meta to restore free WhatsApp access for rival AI bots
The European Commission ordered Meta to restore rival AI assistants' access to the WhatsApp Business API on the terms available before an October restriction. Meta must comply within five working days while the antitrust investigation continues, potentially until June 2029, and said it would appeal.
The interim measure leaves the underlying abuse case open but treats distribution as time-sensitive. WhatsApp's API terms can shape assistant adoption before a final ruling, turning pricing and eligibility rules into competition policy during market formation.
Sources: Reuters on the EU interim measure · Associated Press on the WhatsApp order
3. Mythos turns published patches into working exploits within hours
Anthropic tested models against 18 Firefox and 21 Windows kernel security patches. Mythos Preview produced eight working Firefox code-execution exploits and eight Windows privilege-escalation chains; its first Firefox exploit arrived in under an hour, while all eight Windows chains cost about $15,700 in API credits.
The harness supplied patches, binaries, and hardened graders but no internet access. Mythos produced its first Firefox exploit in under an hour and all eight Windows chains before a typical managed fleet would reach broad patch deployment, collapsing the historical patch-diffing interval.
Sources: Anthropic's N-day exploit research