{"data":{"id":"1271976f-1e2e-4808-83c6-2e55ec4d549e","title":"OpenAI Widens Access to Cybersecurity Model After Anthropic’s Mythos Reveal","summary":"OpenAI has expanded access to GPT-5.4-Cyber, a specialized AI model trained specifically for cybersecurity defense work, making it easier for legitimate security professionals to use it. This move follows Anthropic's release of their own cybersecurity model called Mythos.","solution":"N/A -- no mitigation discussed in source.","labels":["industry"],"sourceUrl":"https://www.securityweek.com/openai-widens-access-to-cybersecurity-model-after-anthropics-mythos-reveal/","publishedAt":"2026-04-16T14:27:06.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":[],"issueType":"news","affectedPackages":null,"affectedVendors":["OpenAI","Anthropic"],"affectedVendorsRaw":["OpenAI","Anthropic","GPT-5.4-Cyber","Mythos"],"classifierModel":"claude-haiku-4-5-20251001","classifierPromptVersion":"v3","cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"patchAvailable":null,"disclosureDate":"2026-04-16T14:27:06.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":null,"aiComponentTargeted":"model","llmSpecific":true,"classifierConfidence":0.85,"researchCategory":null,"atlasIds":null}}