Anthropic is expanding the capabilities of its AI systems with Claude Fable 5.2 and Claude Mythos 5.2, designed to handle demanding tasks across software development, scientific research, hardware engineering and cybersecurity. The company says the models can manage projects that typically require significant time and resources. In one demonstration, they worked with more than 1,000 AI agents to create an experimental operating system in just eight days. Their other tasks included developing electronic devices and tackling complex mathematical problems.
Claude Fable 5.2 Can Build An Operating System And Design Gadgets #
Anthropic says Claude Fable 5.2 can manage complex software and hardware projects, including one experiment in which it coordinated more than 1,000 AI agents to build an operating system prototype in eight days. The experimental OS featured storage, drivers, windows, a login screen and an installer. The model also helped rewrite a software service from Python into Rust, reportedly improving its startup speed by 26 times. Its hardware experiments included designing a home voice-assistant hub, a USB speakerphone and a handheld virtual pet, with manufacturing support from Diode.
Introducing Claude Fable 5.2 and Claude Mythos 5.2, designed to tackle the most daunting technical challenges. They’re capable collaborators on ambitious projects in many fields, and show improvements in areas like coding, reasoning, and vision. https://t.co/jP0AutLxXb
— Claude (@claudeai)November 9, 2026
Anthropic Tests Claude On Mathematics, Science And Cybersecurity #
Fable 5.2 was also used to convert an existing proof of Fermat's Last Theorem into a computer-verifiable format, a task completed by 1,000 AI agents in 30 hours. Anthropic says the model also solved two open problems involving black holes and showed improvements in robotics. Mythos 5.2, meanwhile, was tested on cybersecurity and biological research, identifying more software vulnerabilities than earlier models and correctly predicting 28 of 34 virus protein shell structures. Both models reportedly generate responses up to 30% faster than their predecessors. Fable 5.2 is available through Claude, AWS, Google Cloud and Microsoft Azure, while Mythos 5.2 is restricted to verified organisations in fields such as cybersecurity and life sciences. Standard pricing starts at $8 (around Rs 750) per million input tokens and $40 (around Rs 3,700) per million output tokens. An optional fast mode costs twice as much but can increase generation speed by up to 2.5 times. Anthropic also claims to have reduced unnecessary safety blocks by 55% compared with Fable 5.1 and strengthened safeguards against model distillation. For everyday coding and knowledge-based tasks, the company recommends Claude Opus 5.5.
Claude Fable 5.2 And Mythos 5.2: Pricing And Availability #
Both models reportedly deliver responses up to 30% faster than their predecessors. Standard usage costs $8 (around Rs750) per million input tokens and $40 (around Rs3,700) per million output tokens. Users seeking faster generation can opt for a mode that increases token speed by up to 2.5 times, but it doubles the pricing to $16 (around Rs1,500) for input and $80 (around Rs7,500) for output per million tokens. Fable 5.2 is accessible through Claude, Amazon Web Services, Google Cloud and Microsoft Azure, while Mythos 5.2 is restricted to verified organisations working in areas such as cybersecurity and life sciences. Anthropic also says it has reduced unnecessary safety blocks by around 55% compared with Fable 5.1 and strengthened protections against attempts to extract model capabilities. For routine coding and knowledge-based work, the company continues to recommend Claude Opus 5.5.
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