OpenAI Restricts Access to Cyber Tool, Reversing Its Earlier Criticism of Anthropic

From Critic to Imitator: OpenAI's Reversal

Not long ago, OpenAI publicly criticized Anthropic for imposing access restrictions on its high-capability model Mythos, arguing that such practices were detrimental to the adoption of AI technology and the building of an open ecosystem. But in a dramatic twist, OpenAI itself has now adopted a similar restrictive strategy for its latest tool.

OpenAI recently announced that GPT-5.5 Cyber, its testing tool purpose-built for the cybersecurity domain, will follow a phased release strategy. Initially, it will be available only to "critical cyber defenders" rather than offering unrestricted access to all users.

GPT-5.5 Cyber: A Powerful Cybersecurity Weapon

GPT-5.5 Cyber is an AI tool from OpenAI focused on the cybersecurity field, designed to help security professionals with critical tasks such as vulnerability detection, threat analysis, and penetration testing. Given the tool's formidable offensive and defensive capabilities, it could pose serious security risks if acquired by malicious actors.

For this reason, OpenAI has decided to tightly control access during the initial phase, limiting eligibility to verified cybersecurity defense organizations and professionals. While this decision is justifiable from a security standpoint, it stands in sharp contrast to the "openness" philosophy OpenAI has previously championed.

Industry Debate: Double Standards or Pragmatic Choice?

The news quickly ignited widespread discussion within the AI industry. Many insiders have pointed out the considerable irony in OpenAI's earlier criticism of Anthropic's decision to restrict access to the Mythos model.

Supporters argue that the unique nature of cybersecurity tools makes restricted access a responsible approach. If powerful security testing tools were released without limitations, they could become a "double-edged sword" in the hands of hackers, causing incalculable damage. From this perspective, OpenAI's decision reflects a prudent attitude toward security risks.

Critics, however, contend that the move exposes a "double standard" in OpenAI's stance on openness versus restriction. When a competitor implements access limitations, OpenAI frames it as stifling innovation; yet when facing similar security considerations itself, the company chooses the same path. This inconsistency undermines OpenAI's credibility and authority within the industry.

A Deeper Industry Trend

In reality, the approaches taken by both OpenAI and Anthropic reflect a common dilemma facing the AI industry today: as model capabilities advance at breakneck speed, striking a balance between openness and security has become an unavoidable challenge for every frontier AI company.

From the safety evaluation reports accompanying GPT-4's release, to Anthropic's tiered access strategy for its Claude model series, to the restricted rollout of GPT-5.5 Cyber, leading AI companies are gradually forming a consensus — not all AI capabilities are suitable for unconditional public release, especially in high-risk domains such as cybersecurity and biotechnology.

This philosophy of "responsible release" is becoming the industry mainstream, even as companies continue to differ in their specific implementation standards and levels of transparency.

Looking Ahead: Rebalancing Openness and Security

This episode may prompt the industry to engage in deeper reflection on the relationship between "openness" and "security." Going forward, we are likely to see more AI companies adopt tiered access mechanisms for high-risk use cases while maintaining a relatively open posture for general-purpose capabilities.

For OpenAI, the key challenge will be rebuilding a coherent narrative following this shift in stance — a significant test for its brand communications. For the industry as a whole, this incident serves as a reminder: in an era of ever-expanding AI capabilities, any simplistic binary opposition between openness and restriction may prove untenable. Pragmatism and flexibility are the right approach to navigating a complex reality.