Anthropic introduces Opus 5 model with improved performance and fewer restrictions

Jul 24, 2026

AI Summary

Anthropic has launched Opus 5, a new AI model that is cheaper and less restrictive than its predecessor, Fable 5. It outperforms Fable 5 on several benchmarks and features new safeguards aimed at enhancing user experience while maintaining cybersecurity measures.

Anthropic launched its Opus 5 model, which is smaller and less restrictive than Fable 5, on Friday. The model is expected to be more cost-effective for users.
Opus 5 outperforms Fable 5 on various benchmarks and is released only two months after Opus 4.8.
Unlike Fable, Opus 5 is not subject to a 30-day data retention policy, addressing privacy concerns among users.
The model includes safeguards for cybersecurity tasks, preventing it from scanning for vulnerabilities in software binaries but allowing it to search for vulnerabilities in source code.
Anthropic anticipates that safety classifiers will engage 85% less frequently with Opus 5 compared to Fable 5.
A new feature called Automatic Fallbacks allows users to automatically route requests to a less powerful model when safety classifiers are triggered, providing functional responses instead of error messages.

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Anthropic introduces Opus 5 model with improved performance and fewer restrictions

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