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OpenAI releases GPT-5.5-Cyber for security research

By PulseAugur Editorial · [4 sources] ·

OpenAI has released GPT-5.5-Cyber, a specialized model designed to identify and exploit security vulnerabilities. Access to this model is restricted to vetted defenders of critical infrastructure, including partners like Cisco, CrowdStrike, and Cloudflare. This release positions GPT-5.5-Cyber as a direct competitor to Anthropic's Mythos Preview, which has also demonstrated capabilities in finding security flaws. AI

IMPACT New specialized model release for cybersecurity defense, directly competing with Anthropic's security-focused AI.

RANK_REASON Frontier-lab model release with system card.

Read on The Decoder →

AI-generated summary · Google Gemini · from 4 sources. How we write summaries →

OpenAI releases GPT-5.5-Cyber for security research

COVERAGE [4]

  1. The Decoder TIER_1 English(EN) · Maximilian Schreiner ·

    OpenAI opens GPT-5.5-Cyber to vetted security researchers

    <p><img alt="" class="attachment-full size-full wp-post-image" height="768" src="https://the-decoder.com/wp-content/uploads/2026/04/gpt-55_title.png" style="height: auto; margin-bottom: 10px;" width="1376" /></p> <p> OpenAI is releasing GPT-5.5-Cyber, a model variant that rejects…

  2. Mastodon — fosstodon.org TIER_1 English(EN) · [email protected] ·

    🤖 Cloudflare just published what they found after running Anthropic's Mythos Preview against 50+ of their own repos and the results are worth reading If you mis

    🤖 Cloudflare just published what they found after running Anthropic's Mythos Preview against 50+ of their own repos and the results are worth reading If you missed the Project Glasswing announcement last month: Anthropic built a security-focused model that autonomously found thou…

  3. Mastodon — fosstodon.org TIER_1 English(EN) · [email protected] ·

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  4. Mastodon — fosstodon.org TIER_1 English(EN) · [email protected] ·

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    LINKS linuxlinks.com/gitu-tui-git-client-inspir…

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