Anthropic releases Opus 5 with ‘close’ to Fable 5’s capabilities
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.
Anthropic promises...
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