Anthropic Opens Mythos-Class AI to Public With Safety Guardrails

Anthropic is preparing to file its IPO prospectus after Labor Day 2026, marking the first time public investors will see the company's full financial picture. Beyond standard regulatory disclosures, large institutional investors are pressing Anthropic to provide AI-specific metrics including token economics, revenue per gigawatt of compute, and net revenue retention, though the company has not committed to releasing these figures.

Nscale is marketing approximately $103 billion in total contracted revenue to prospective investors, including a newly signed $45 billion computing deal with Anthropic. The neocloud infrastructure company is preparing for an initial public offering that could occur as soon as this month. The contracted revenue figure represents a significant milestone as the company moves toward going public.

Anthropic released Claude Fable 5.1 and Mythos 5.1, its latest large language models, alongside a 75% cost reduction for cached context reads and a new Enterprise Frontier Safeguards security architecture. The release targets enterprise deployment of persistent agents capable of multi-hour problem-solving tasks. Fable 5.1 shows significant benchmark improvements across scientific research, coding, and business workflow tasks, though results are vendor-reported rather than independently verified.

Anthropic has signed a $35 billion compute capacity deal with Lambda Labs, an Nvidia-backed cloud provider. Nvidia will supply the chips for the data center providing the capacity and hold a stake in the arrangement. The deal underscores the critical role of GPU supply and cloud infrastructure partnerships in scaling large language model development.