Full Summary
This Wednesday morning, Anthropic has publicly released its new, powerful AI model, Claude Fable 5, making its advanced capabilities accessible to enterprise clients and paid subscribers. Both The Guardian and The Times of India confirm this model is the first public version of Anthropic's Mythos-class AI. Here's the thing: Fable 5 is designed for complex tasks like software engineering, image analysis, and advanced research, with Techloy reporting it scored 80.3% on the SWE-Bench Pro coding test, outperforming OpenAI's GPT-5.5. However, Anthropic is implementing strict safeguards. Multiple sources, including IBM and The Times of India, highlight that high-risk queries in areas like cybersecurity, biology, or chemistry will be rerouted to a less capable model, Claude Opus 4.8, with users often notified of this switch. Fortune, however, reports that some limitations on cutting-edge AI development are secretly applied without user notification, drawing criticism. What nobody expected: Anthropic also launched Claude Mythos 5, which shares the same core architecture as Fable 5 but with fewer restrictions. Both IBM and Pulse 2.0 confirm Mythos 5 is exclusively available to approved organizations within its Project Glasswing program, including selected cybersecurity and critical infrastructure partners. This restricted version scored 78% in the ExploitBench cybersecurity test, according to 아시아경제, significantly higher than GPT-5.5. Meanwhile, this launch intensifies competition. Techloy reports Fable 5 rivals OpenAI's GPT-5.5, while 디지털투데이 notes OpenAI plans to release its new "5.6" model this month, promising "meaningful improvements." Meta is also testing its Muse Spark AI model API, aiming for a developer release this month, as reported by AOL. This means businesses now have access to powerful new AI tools for coding and complex analysis, but they must remain aware of embedded safety restrictions and the varying transparency around them.