Anthropic announced on Thursday that it will roll out its powerful Claude Mythos model to all customers within the coming weeks, even as the company releases an upgraded Claude Opus 4.8.
Mythos is Anthropic's large language model designed with advanced cybersecurity features. The model's capabilities have prompted concern among corporate executives and world leaders about its potential effects. Under Project Glasswing, select major technology firms - including Amazon, Microsoft and Apple - have permission to use Mythos specifically for cybersecurity purposes.
Separately, Anthropic said it is launching Claude Opus 4.8 as an update to its Opus line. The company said Opus 4.8 will carry the same price as the preceding Opus model. Anthropic reported that the new release performs better across a range of benchmarks, with the most notable gains in honesty metrics.
Early testers of Opus 4.8 told Anthropic that the model is more inclined to signal uncertainty about its outputs and less prone to make claims without sufficient support. The company framed those improvements as addressing a common weakness in AI: models that "sometimes jump to conclusions, confidently claiming to have made progress in their work despite the evidence being thin," the Claude maker said.
The announcement combines two parallel moves: a broader customer rollout for a model with significant cybersecurity emphasis, and an iterative improvement to Anthropic's Opus series that targets reliability and truthful behavior at parity pricing. The timing places both products in the market concurrently, with Mythos positioned for selective use by major tech firms under Project Glasswing and Opus 4.8 positioned as the next standard Opus-tier offering.
Details in the company's statement highlight the focus on reducing unsupported assertions by the model and increasing its tendency to acknowledge uncertainty. Beyond those points, the company has not provided additional specifics in the announcement about long-term deployment schedules or changes to access policies beyond the coming weeks timeline for Mythos.