OpenAI announced that its upcoming GPT-5.5 model performed on par with the heavily promoted Mythos Preview in recent cybersecurity evaluations. CEO Sam Altman criticized the hype surrounding Mythos, calling it fear‑based marketing, while reiterating that the new model will initially be available only to a select group of critical cyber defenders. The company’s Trusted Access for Cyber pilot, launched in February, continues to serve as the gateway for researchers and enterprises to test frontier models under strict safeguards. Read more →

OpenAI announced it will roll out its GPT-5.5 Cyber suite to a select group of "critical cyber defenders" in the coming days, mirroring Anthropic's recent restriction of its Mythos tool. CEO Sam Altman posted on X that access will be granted through an application process that verifies users' credentials and intended use. The move aims to keep the powerful capabilities—penetration testing, vulnerability exploitation, and malware reverse engineering—from falling into the hands of malicious actors while the company consults with the U.S. government on broader availability. Read more →

OpenAI announced Thursday that it will roll out an optional Advanced Account Security tier for ChatGPT and Codex accounts. The new feature replaces passwords with physical security keys or passkeys, eliminates email and SMS recovery, and forces tighter sign‑in windows. Aimed at high‑risk users such as journalists, elected officials and researchers, the measure also blocks support staff from accessing recovery options, limiting attackers’ social‑engineering avenues. OpenAI partnered with Yubico to offer discounted YubiKey bundles and will require members of its Trusted Access for Cyber program to enable the tier by June 1. Read more →

OpenAI announced that its newest model, GPT-5.5-Cyber, will be released in a tightly controlled rollout aimed at trusted cybersecurity professionals. CEO Sam Altman said the deployment will begin within days and will be limited to a vetted group of "cyber defenders" as the company works with the broader ecosystem and government agencies to define secure access. No technical specifications have been released, but the model appears to be a specialized offshoot of the recently launched GPT-5.5. The move follows a pattern of AI firms withholding powerful models from the public amid concerns about misuse. Read more →

Malwarebytes is rolling out a new connector that integrates its threat‑intelligence engine directly into Anthropic's Claude. The add‑on lets users paste URLs, phone numbers or email addresses into a Claude chat and receive an instant verdict—safe, malicious, suspicious or unknown—along with remediation tips. The move comes as AI‑generated scams become increasingly convincing, with a recent Malwarebytes survey finding two‑thirds of respondents struggle to tell a fake from the real. The connector requires no Malwarebytes account and can be enabled in Claude’s settings. Read more →

A group of Discord community members accessed Anthropic’s tightly guarded Mythos Preview AI model after exploiting a breach at AI‑training startup Mercur and leveraging existing permissions from a contracting role. The researchers used the model only to create simple websites, avoiding detection, but their actions expose gaps in Anthropic’s access controls and raise concerns about the security of advanced AI tools. Read more →

Alphabet’s Google Cloud announced a multi‑phase deal that could total $40 billion for AI lab Anthropic. The first tranche of $10 billion values the startup at $350 billion, with an additional $30 billion tied to performance milestones. The partnership expands Anthropic’s access to Google’s tensor processing units and adds roughly 5 gigawatts of compute capacity over five years. The move follows Anthropic’s rollout of its latest model, Mythos, and comes as the firm also secures funding from Amazon and eyes a possible IPO later this year. Read more →