Anthropic debuts Claude Sonnet 5 for everyday agent tasks with lower cyber risk
Anthropic is releasing Claude Sonnet 5, a lower-priced model designed to bring more agentic AI capabilities to everyday users without the same cyber-risk profile as its most powerful systems .
Why it matters:The company says Sonnet 5 can handle autonomous tasks — including browser use, planning, coding and knowledge work — while posing fewer dangerous cyber risks than its Opus and Mythos models.
Zoom in:Anthropic says Sonnet 5 approaches the performance of Opus 4.8, its most advanced widely available model, while Mythos and Fable are still restricted.
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Sonnet 5 was not deliberately trained on cybersecurity tasks and has a "much lower ability" to perform any dangerous cyber activities than Anthropic's current Opus models.
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Anthropic is in ongoing discussions with the Trump administration over its models and those talks include the release of Sonnet 5.
The intrigue:The next-generation Sonnet-class model arrives while Anthropic is still waiting for government approval to restore full access to its most powerful models.
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Mythos is now available on a limited basis and Fable 5 is on track to return soon , a source tells Axios.
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This comes after the government abruptly asked Anthropic to take down these models over security concerns.
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The administration also asked OpenAI to stagger the release of its most powerful class of models, GPT-5.6.
Between the lines:Anthropic — like OpenAI — is betting that its coveted enterprise users will soon use AI less for chat and more for delegating tasks to agents.
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Last week, OpenAI released data with Columbia, Duke and the University of Pennsylvania showing that nondevelopers are the fastest-growing user group for its agentic work tool, Codex.
Follow the money:Sonnet 5 becomes the default model for all Claude Free and Pro users today, and is also available to Max, Team and Enterprise customers.
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The company says the model gives developers a cheaper option for many coding and agentic workloads.
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This comes amid a renewed focus on AI usage costs that's led some companies and developers to pivot to cheaper Chinese models.
The bottom line:The AI labs are still releasing models as the administration figures out which to allow and which to limit.
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