… Now, with today's release of Claude Fable 5 , Anthropic says it finally has a model of this class that's "safe for general use." Anthropic is also releasing the unrestricted Mythos 5 model to members of its Project Glasswing program for use in sensitive cybersecurity and biology contexts. …
… Anthropic had released the pair on Tuesday , putting the latter into general availability while keeping the unrestricted Mythos 5 limited to partners in its Project Glasswing security program. Both descend from the same Mythos Preview model that Anthropic first announced in April. …
… On an internal test that asks each new model to make training code run faster, results climbed from roughly triple the original speed with Claude Opus 4 in May 2025 to about 52 times with the unreleased Mythos Preview model by April 2026, against the four to eight hours a skilled researcher needs f… …
… The news also comes hot on the heels of the Trump administration issuing an executive order that asks AI companies to volunteer their leading-edge models to the government for 30 days before they're made available to other entities, though it's unclear what will be classified as a "covered frontier… …
… Lastly, it has “considerably” raised the API rate limits, the volume of requests developers can make, for Claude Opus models. …
… It also developed its Mythos model , which it hasn't released widely and has used with partners to help discover and close security vulnerabilities. …