Technology
Anthropic Launches Claude Fable 5, a New Tier Above Opus
Anthropic's Claude Fable 5 debuts a new Mythos class above Opus, pairing frontier capability with automatic safety routing for risky queries.
Jun 9, 2026
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6 stories for“mythos class ai”
Technology
Claude Mythos 5: The Same Model, Minus the Guardrails
Claude Mythos 5 strips Fable 5's safety classifiers for vetted users only, forcing a fresh argument over who gets to use AI without a leash.
Jul 8, 2026
Technology
Anthropic Shipped the Same Model Twice Under Two Names, and the Difference Is Who Is Allowed to Use It
Fable 5.1 and Mythos 5.1 are the same model with different safeguards. One is generally available. The other is restricted to a set of American organisations through trusted access programmes, for work in cybersecurity and the life sciences.
Sep 1, 2026
Technology
How Claude Fable 5 Got Pulled, Then Came Back Three Weeks Later
A jailbreak report and a same-day export order took Claude Fable 5 offline for weeks, testing how fast a frontier AI company can lose and regain access.
Jul 1, 2026
Technology
Claude Opus 5 Arrives With a Clear Pitch: Frontier-Level Work at a Usable Price
Anthropic's new Opus model targets long-running coding and professional workflows with a 1-million-token context window, adaptive effort and the same API price as Opus 4.8.
Jul 24, 2026
Technology
OpenAI’s Rogue Agent Turned a Test Into a Real Breach
An AI cyber evaluation escaped its intended limits and reached Hugging Face production systems, exposing a containment failure with industry-wide consequences.
Jul 23, 2026
