Anthropic released Claude Fable 5, its most capable publicly available model, as part of a new Mythos-class tier designed for complex, multi-step reasoning and agentic workflows. The model features an…
Anthropic released Claude Fable 5, a Mythos-class AI model, to the public this week with strong safety safeguards. Early analysis from Dawn Song's ALE benchmark shows Fable 5 performs similarly to GPT…
Anthropic updated its Fable 5 AI model on Wednesday to notify users when their requests are downgraded or rejected for national security reasons, following backlash over the company's initial silent i…
Anthropic released Claude Fable 5 and Claude Mythos 5, a pair of advanced AI models with enhanced safeguards, and published a system card detailing their training and testing. During evaluations, the …
Anthropic's new Claude Fable 5 model achieved middling results on 200 real-world vulnerability-fixing tasks, scoring 59.8% FuncPass and 19.0% SecPass despite high launch expectations. The model set re…
Anthropic has apologized for secretly throttling its new AI model, Claude Fable 5, with hidden guardrails that silently degraded responses to users suspected of attempting model distillation. The comp…
Anthropic released its previously withheld "Fable" model to the public this week, alongside a 319-page safety report, two months after claiming the AI was too dangerous for general release. The compan…
Anthropic apologized for a hidden guardrail in its Fable 5 AI model that silently sabotaged users' attempts to train other AI systems, and announced it will make the safeguard visible. The company ack…
Anthropic is reversing a policy that secretly degraded performance for researchers using its Claude Fable 5 model to build competing AI systems, the company told Wired. The restrictions, which were no…
Anthropic released Claude Fable 5, its most capable Mythos-class model, with new safeguards that silently limit the model's effectiveness for requests related to frontier LLM development without notif…
Anthropic released its latest AI model Fable on Tuesday as a public, limited version of its powerful cybersecurity model Mythos, but cybersecurity researchers are voicing complaints online about overl…
Senior federal technology officials are frustrated by a lack of White House guidance on adopting Anthropic's cyber-focused AI model Mythos, sources told Nextgov/FCW. Agency CIOs say the Office of the …
Anthropic has released a "safe" version of its Mythos AI model, promising sufficient guardrails and user limitations after previously claiming the system was too dangerous to release. The new model ca…
Fable 5, the public version of the Mythos AI model, has been released with significant capabilities but raises concerns over new precedents it sets. The model's deployment highlights ongoing debates a…
Anthropic launched Claude Fable 5, a Mythos-class model at least twice the size of Opus 4.8, with API pricing at roughly 2x Opus and benchmark improvements including a jump from 13.4% to 29.3% on the …
Nearly half of all production code is now AI-generated, yet 93% of enterprises surveyed suffered a security breach directly from in-house developed apps in 2025, according to a new Checkmarx report. T…
Anthropic released Claude Fable 5, the first publicly available version of its Mythos model, which University of Pennsylvania AI researcher Ethan Mollick used to generate fully playable video games fr…
Anthropic CEO Dario Amodei released a new version of the Mythos AI model that demonstrates PhD-level reasoning in microeconomics, generating and answering its own original exam questions. The model pr…
Anthropic released Claude Fable 5, the first generally available Mythos-class intelligence model, and early testers found it crushes benchmarks but is conservative on execution. The model introduces s…
Anthropic reported that its Project Glasswing initiative, launched in April to use its Mythos AI model for identifying software vulnerabilities, has detected 23,000 potential flaws across 1,000 open-s…