A leak reveals that Anthropic is testing a more capable AI model "Claude Mythos"
fortune.com
March 27, 2026
7 min read
Summary
Anthropic is testing a new AI model named 'Mythos,' which is claimed to be the most powerful model the company has developed to date. Early access customers are currently trialing this model, which represents a significant advancement in AI performance.
Key Takeaways
- Anthropic is testing a new AI model called Claude Mythos, which is described as the most powerful AI model the company has ever developed.
- The new model is believed to pose unprecedented cybersecurity risks and is currently being trialed by early access customers.
- Anthropic is introducing a new tier of AI models named Capybara, which is larger and more capable than its previous Opus models.
- Claude Mythos achieves significantly higher scores in software coding, academic reasoning, and cybersecurity compared to the previous best model, Claude Opus 4.6.
Community Sentiment
MixedPositives
- Any alleged 'step change' over version 4.6 is worth paying attention to, indicating potential advancements in AI capabilities.
- The Capybara tier concept could introduce meaningful improvements, suggesting that there may be significant innovations in this new model.
Concerns
- The irony of discussing cybersecurity capabilities while leaking information highlights serious concerns about the model's security and reliability.
- The cycle of declaring every new model as 'the one' is becoming tiresome, indicating skepticism about the actual advancements being made.
Source
fortune.com
Published
March 27, 2026
Reading Time
7 minutes
Relevance Score
45/100
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