Claude 5.1 Unleashed: Fable 5.1 Now Available to Pro Users, Mythos 5.1 Reserved for Scientists
AI-summarised brief · reviewed before publication
Anthropic rolled out upgraded versions of its Claude model, releasing Fable 5.1 to all Claude Pro and Max subscribers and reserving Mythos 5.1 for a trusted‑access program limited to scientists and cybersecurity researchers. Both variants share the same core architecture but differ in safeguard levels. Fable 5.1 adds new capabilities—such as generating a high‑resolution Venus terrain map from three‑decade‑old NASA radar data—and is priced lower on cached tokens, though its raw token cost remains $10 per million input and $50 per million output. Mythos 5.1 rewrites GPU kernels for genomics workloads, accelerating them up to 2.5 ×, while loosening false‑positive filters for legitimate research. The models run on Anthropic’s new Enterprise Frontier Safeguards system, promising zero data retention for enterprise customers until full rollout later this fall. Competitive benchmarks show OpenAI’s GPT‑6 Astra surpassing Fable 5.1 on several tests, yet Fable 5.1 still leads on niche evaluations like Humanity’s Last Exam with tools.
💡 Why It Matters
- · By opening advanced AI features to vetted researchers while tightening public access, Anthropic aims to balance rapid scientific progress with containment of high‑risk capabilities.
- · This dual‑track approach could set a new industry standard for responsible AI deployment.
