Anthropic releases Opus 5 with ‘close’ to Fable 5’s capabilities
Anthropic has launched Claude Opus 5, positioning it as a high-performance model for enterprise use that balances advanced capabilities with improved cybersecurity safeguards. The release follows a period of intense regulatory scrutiny and negotiations between the company and the US government.
Why it matters
The release highlights the evolving relationship between AI labs and government regulators, particularly regarding the testing and deployment of powerful AI models.
Weeks after Anthropic’s latest toe-to-toe with the US government, and days after an OpenAI security incident that dominated tech industry discussions, Anthropic on Thursday released its newest model, Claude Opus 5.
The company said in a release that Opus 5 “comes close to the capabilities of Claude Fable 5 in many domains” and is much better at complex coding tasks. (Fable 5 is the public-facing Mythos-class model that drew the government’s ire, was taken offline for a few weeks along with Mythos 5, and then brought back with even stronger cyber safeguards than before.)
The Fable 5 concerns — and the ensuing weeks of negotiations between Anthropic and the government — kicked off a new era of AI regulation for the Trump administration. Soon after, when OpenAI released GPT-5.6, it underwent a roughly two-week trial period of sorts, rolling out in limited preview solely to government-approved entities.
Get smarter about the news
Sign up free for a feed built around what you actually care about, Dive Deeper research on any story, and the full text of every article.
Create free accountAlready have an account? Sign in