Expired80% confidenceFactExact time
Anthropic has not yet publicly disclosed specific technical details or benchmark performance for the Claude Mythos model
1
Sources
80%
Confidence
Medium-term (~90 days)
Relevance
6/2/2026
First Seen
Valid until: 8/31/2026(expired)
Sources
Project Glasswing Expansion: 150 Organizations Gain Access to Claude Mythos
twitterAnthropicAI6/2/2026
Related Entities
Related Claims
UnverifiedAnthropic is advancing the new Claude Mythos model through controlled expansion rather than direct public release67% similarUnverifiedA user reported that Claude Mythos 5 briefly appeared as a model option in Anthropic's API before being quickly pulled.61% similarUnverifiedAnthropic is internally red-teaming a new model codenamed 'Oceanus,' which is considered the successor to Mythos Preview.60% similarUnverifiedAnthropic has never released a model version called 'Claude Opus 4.8'57% similarUnverifiedAnthropic released Claude Mythos in April 2026.57% similar
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