# 'Trusted access for the next era of cyber defense': OpenAI reveals its Mythos rival, designed for cybersecurity pros to spot the next level of attacks

> OpenAI launches GPT‑5. 4‑Cyber, a cyber‑defense variant of GPT‑5. 4 Model adds reverse engineering and lower refusal boundaries for defenders Available via Trusted Access for Cyber program, scaled to thousands of…

- **Source:** [TechRadar](https://www.techradar.com/pro/security/trusted-access-for-the-next-era-of-cyber-defense-openai-reveals-its-mythos-rival-designed-for-cybersecurity-pros-to-spot-the-next-level-of-attacks?utm_source=gearopen.com&utm_medium=referral&utm_campaign=feed&utm_content=69df86ae1e9a90c78cf42920)
- **Published:** 2026-04-15
- **Category:** AI & Bots
- **Tags:** #cybersecurity #anthropic #openai #chatgpt #cyber #next #access #defense
- **Canonical:** http://localhost:4321/a/69df86ae1e9a90c78cf42920

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_GearOpen's distilled summary. The full original article is published at TechRadar (source link above); GearOpen does not republish the source's full text._