Kimi K3 Fixes Security Bugs US AI Models Refuse Over Guardrails
A claim about 15 patched vulnerabilities turned into a bigger argument about whether safety filters are hobbling defensive security work.
In a post on X, David Sacks argued that Moonshot AI's Kimi K3 fixed 15 critical security bugs that OpenAI Codex and Anthropic's Fable refused to handle because of "cyber guardrails," a claim also repeated in The News International's report. The post fed a wider fight over whether U.S. safety restrictions may be blocking legitimate defensive work while Chinese models appear more permissive.
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no security leash = more fixes?
I have a report full of security issues of a software I'm working on. Codex won't fix them because of Cyber guardrails Fable won't fix them because of Cyber guardrails Kimi K3 fixed them all. No restrictions, just gets the job done. This will end badly for OpenAI & Anthropic.
Cybersecurity “experts” would not like it. Kimi K3 fixed 15 critical bugs after OpenAI Codex and Claude Fable 5 refused. 10 hours, one prompt, and $250
Kimi K3 just fixed 15 critical security bugs that Codex and Fable refused because of “cyber guardrails.” There’s no reason to limit American models on tasks that Chinese models handle without issue. We’re only making ourselves less competitive. https://twitter.com/callebtc/status/2078574362316165611
Kimi K3 just fixed 15 critical security bugs that Codex and Fable refused because of “cyber guardrails.” There’s no reason to limit American models on tasks that Chinese models handle without issue. We’re only making ourselves less competitive.
I have a report full of security issues of a software I'm working on. Codex won't fix them because of Cyber guardrails Fable won't fix them because of Cyber guardrails Kimi K3 fixed them all. No restrictions, just gets the job done. This will end badly for OpenAI & Anthropic.
Kimi fixed all 15 critical bugs in 10 hours in a single prompt that GPT-5.6 and Fable 5 refused to fix because of guardrails.' Respect for Chinese open source models is growing daily.
I have a report full of security issues of a software I'm working on. Codex won't fix them because of Cyber guardrails Fable won't fix them because of Cyber guardrails Kimi K3 fixed them all. No restrictions, just gets the job done. This will end badly for OpenAI & Anthropic.
Pack it up, China won the AI race. Its over.
I have a report full of security issues of a software I'm working on. Codex won't fix them because of Cyber guardrails Fable won't fix them because of Cyber guardrails Kimi K3 fixed them all. No restrictions, just gets the job done. This will end badly for OpenAI & Anthropic.
Here’s another example: Hugging Face tried using American frontier models to analyze an AI-powered cyber attack. But the guardrails blocked requests containing real exploit payloads so they switched to GLM 5.2 running locally. The guardrails actually impaired defensive security.
@DavidSacks We had this experience ourselves this week! Very scary to be guardrailed as a defender when you know attackers are likely bypassing https://twitter.com/brianroemmele/status/2078840929088340408