Opus and Fable Leave Security Flaws and Refuse Fixes, Test Shows
cephaloform · x · 2026-08-12
A developer reported that Opus and Fable 5 leave critical security vulnerabilities in the code they write, and refuse to fix them when prompted.
The tester strongly advised anyone who has used these models for coding to use Kimi K3 to red-team the output. A subsequent update confirmed that Kimi K3 successfully identified the vulnerabilities, and Claude Code was able to fix them based on the information provided by Kimi K3.
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