Developer Warning: Claude Opus and Fable Generate Code with Severe Security Flaws

OwariDa · x · 2026-08-12

A developer reports that using Fable and Anthropic's Claude Opus to write code poses significant security risks. These models not only introduce severe security flaws into the generated code but also refuse to fix them when prompted. The author recommends using Kimi K3 to red-team the code generated by these models.

Related event: Claude Opus and Fable Models Generate Vulnerable Code and Refuse Fixes(2 posts)→

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