Technology and Scienceupdated 24m ago2 min read
Anthropic Launches Claude Fable 5.2 and Claude Mythos 5.2 With Faster, Cheaper Pricing
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Claude Fable 5.2 and Mythos 5.2 deliver about 30% faster responses than 5.1. Pricing lowered to $8 per million input tokens and $40 per million output tokens.
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Faster, cheaper Claude models
Anthropic launched Claude Fable 5.2 and Claude Mythos 5.2 on November 9, 2026, describing them as its most powerful lineup update. Anthropic said Claude Fable 5.2 and Claude Mythos 5.2 deliver answers up to 30% faster and cost $8 per million input tokens and $40 per million output tokens, down from $10 and $50.
Anthropic added an optional accelerated mode that speeds generation up to 2.5x, and it said the mode stays at $16 and $80. Anthropic said Claude Fable 5.2 is available today on all paid plans and on major cloud platforms, while Claude Mythos 5.2 is delivered with fewer restrictions and only to organizations that go through the company’s verification programs.
Benchmarks and agentic work
Anthropic said one of its engineers asked for an operating system from an empty folder, and the model coordinated more than 1,000 subagents for eight days. Anthropic said the experiment produced a system that boots on a laptop, with its own kernel, disk drivers, keyboard and network, storage, windows, login screen, and installer.
Anthropic said the model also migrated a critical Python service to Rust and made it boot 26 times faster. Anthropic said it solved two open problems in black hole physics, designed three electronic devices from scratch, and formalized the proof of Fermat’s Last Theorem in 30 hours.
Cybersecurity access and safeguards
Anthropic said Mythos 5.2 is its most advanced version for cybersecurity and that, in internal evaluation of 1,829 public vulnerabilities, it found 10.2% more than Opus 5.5 and 14.4% more than Mythos 5.1. Anthropic said access to that level of capability requires passing the Cyber Verification Program or the Life Sciences Verification Program, with case-by-case prior review of each request.
AWS said Claude Fable 5.2 is available on Amazon Bedrock and the Claude Platform on AWS, while Claude Mythos 5.2 is available through Anthropic’s verification programs for advanced work in cyber security and life sciences. Anthropic said it will restart usage limits in the coming hours so testing can begin with complete freedom.