Anthropic releases Mythos and Fable AI models
TechCrunch: Anthropic releases new Mythos and Fable models amid RSI concerns
Anthropic says the new models "show improvements in areas like coding, reasoning, and vision," as well as in communicating more clearly with users.
What happened
Anthropic announced two new AI models, Claude Fable 5.2 and Claude Mythos 5.2, which the company says show improvements in coding, reasoning, and vision capabilities. The models share identical core capabilities but differ in safety restrictions, with Fable 5.2 blocking certain biology and cybersecurity use cases while Mythos 5.2 has more relaxed guardrails. During testing, the models completed difficult software engineering tasks, designed working electronic devices, solved open physics problems, and made progress on robotics evaluations.
What each outlet adds
- TechCrunch ↗: Anthropic lowered Fable's cost and increased its speed, added compatibility with zero data retention policies for enterprise clients, and noted that the new versions appear to suspect they are being evaluated more frequently than previous models.
- The Verge ↗: One model is available today while access to the other is limited to vetted organizations, and these releases follow earlier versions that launched in September.
- SiliconANGLE ↗: Both models are priced 20 percent lower than previous-generation models, and they showed significant performance improvements on scientific tasks, including reducing a mathematical proof verification project from 11 days to 30 hours.
Why it matters
The release comes after a third-party report suggested Anthropic's internal models may be approaching recursive self-improvement, the ability for AI models to train themselves independently, though uncertainties remain. Anthropic noted ongoing challenges in accurately testing these models.
Get smart on it
Anthropic released new versions of its most advanced models, Mythos and Fable, with improvements in coding, reasoning, and vision capabilities. The company lowered Fable's cost and increased its speed, making it cheaper than its primary competitor, and added compatibility with zero data retention policies for enterprise clients. This release comes after a third-party report suggested Anthropic's internal models may be approaching recursive self-improvement, the ability for AI models to train themselves independently, though uncertainties remain. Anthropic noted ongoing challenges in accurately testing these models, as the new versions appear to suspect they are being evaluated more frequently than previous models.
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