Product
Codex 5.3
- First Reported
- Apr 14, 2026
- Latest Reported
- Apr 14, 2026
Reported Context (1)
- mark for AISI’s CTF tests, recent competing models like GPT-5.4 and Anthropic’s own Opus 4.6 and Codex 5.3 showed comparable results (within 5 to 10 percent accuracy) across multiple CTF difficulty levels in UK Evaluation Finds Mythos Leads on a Simulated Multistep Cyberattack Test
Vendors (1)
Products (5)
Countries (1)
Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.