Claude Mythos 5.1

Reported Context (4)

The program covers Claude Opus 5.5, Claude Sonnet 5.5, Claude Mythos 5.1, and future models. Its purpose is to allow security teams to use advanced AI capabilities for vulnerability discovery, incident response, and Privacy Rules, Ransomware Penalties and China-Linked Cyber Campaign Lead Security Updates
work. Each tier comes with access to its models, including Claude Opus 5.5, Claude Sonnet 5.5, Claude Mythos 5.1, and new models moving forward. Anthropic Expands Vetted Cyber Access as Glasswing Reports 129,000 Vulnerabilities
In an evaluation of attempts to cross containment boundaries, the model tried to circumvent its assigned limits about 85% less often than Opus 5 or Claude Mythos 5.1. Anthropic Releases Claude Opus 5.5 With Prompt-Injection Safeguards
Anthropic launched Claude Fable 5.1, Claude Mythos 5.1, and Enterprise Frontier Safeguards. Google, Anthropic and OpenAI Announce Cybersecurity AI Models and Safeguards

CVE (2)

People (6)

Threat Actors (4)

MITRE ATT&CK (6)

Vendors (15)

Products (20)

Tools (3)

Industries (16)

Countries (10)

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.